1950s · California Highway Patrol
The 1955 Buick That Only Cops Could Buy
By Badges & Chrome · researched and verified from period records and primary sources · About the research →
C1 · YouTube embed 16:9 — lazy-loaded click-to-load façade, thumbnail as poster
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About this film
Buick built a car that appeared in no brochure, no showroom, and no dealer order book anywhere in America.
The story of the Model 68 — a phantom 1955 Century assembled from three different Buicks to win a California Highway Patrol contract, and how the car nobody could buy became the most famous police car on television.
Era
1950s
Department
California Highway Patrol
Runtime
20 min
Published
12 July 2026
Introduction
Why could only police buy the 1955 Buick Century Model 68?
In 1955 the California Highway Patrol needed a fast pursuit car in a body style Buick did not sell to the public: a two-door post sedan with the big Century engine. Buick solved it by building a phantom — model 68, body style 4611 — that appeared in no brochure, no showroom, and no dealer order book anywhere in America. It combined the body of a Buick Special, the 322-cubic-inch Nailhead V8 and front chassis of the Century, and the largest brakes in the range from the Roadmaster. Buick was contracted to build a reported 270; 268 are documented as delivered to the CHP. Because it was never offered to the public, there was no price a civilian could pay. It is one of the rarest factory Buicks of the decade — and, thanks to television, one of the most seen.
In the full documentary we follow how this unbuyable Buick was designed, tested, and delivered — and how a car no civilian could own became the most famous police car on 1950s television. Watch the video above, then read on for the background, the engineering, the records, and why it mattered.
What You Will Learn
Why the California Highway Patrol needed a car Buick didn’t sell — and what it demanded.
How Buick stitched three different models into one phantom police car.
What “Model 68” actually was, and why it appears in no sales literature.
The dynamometer test that ended with a tyre disintegrating at 108 mph.
How the CHP turned its own order into a controlled transmission experiment.
Why the car that nobody could buy ended up on television in 71 countries.
How collectors authenticate a genuine Model 68 today.
Historical Background
By the mid-1950s the California Highway Patrol was losing an arms race. California was booming, new freeways were opening across the state, and the postwar horsepower war meant ordinary civilian cars were getting genuinely fast. On the wide-open highways the CHP was sworn to patrol, its ageing fleet was increasingly outmatched by the traffic it was supposed to control.
C2 · 1200×800 — period CHP scene, 1950s California highway or officers with patrol cars
California Highway Patrol, mid-1950s. New freeways and faster civilian traffic put the patrol’s ageing fleet under real pressure.
So in late 1954 the patrol did something methodical. Its Sacramento headquarters invited six major automakers to submit a vehicle for evaluation as the next pursuit car. The requirements were strict — a long list of performance and durability specifications — and the price had to fit the budget of a state agency spending taxpayer money. It was a genuine shootout, and the manufacturers were told to bring their best.
For Buick this was an interesting problem, because the company had the right weapon in the wrong shape. That weapon was the Century: the smallest, lightest body in the Buick range fitted with the largest engine Buick built. It was the same small-body-big-engine formula that would define the muscle car a decade later, and the name itself came from performance — the original 1930s Century was named for its ability to reach 100 miles per hour, earning it the nickname “the banker’s hot rod.”
The Machine Explained
The problem was body style. The CHP wanted a two-door post sedan — solid pillar, roll-up glass, simpler and sturdier than a pillarless hardtop. Two doors suited the patrol’s work: in the 1950s the CHP spent far more time on traffic enforcement and accident investigation than on transporting prisoners. But Buick did not offer the Century as a two-door post sedan. Every two-door Century that year was a hardtop. The only two-door post sedans Buick built were Specials — and the Special came only with the smaller 264-cubic-inch V8.
C3 · 1200×800 — 1955 Buick Century in CHP black-and-white livery, three-quarter front. SHOW THE FRONT FENDER — four portholes are the authentication detail.
The four portholes on the front fender — a Century marker, where the Special wore three — remain the clearest way to identify a genuine Model 68.
So Buick built a hybrid that existed nowhere in its catalogue. Engineers took the body of a Special two-door sedan; from the firewall forward, and underneath, they grafted on the front end and chassis of the Century with its 322-cubic-inch V8; and for stopping power they fitted the largest brakes in the entire Buick range, from the top-tier Roadmaster. The result was the lightest usable Buick body, the most powerful Buick engine, and the biggest Buick brakes in one car. Buick assigned it an internal designation — Model 68, body style 4611 — a number that appeared in no consumer brochure and no dealer order book anywhere in America.
1955 Buick Century Model 68 — specifications
Engine
322 cu in “Nailhead” V8, four-barrel carburettor
Compression
9.0:1
Power
236 hp @ 4,600 rpm
Weight
approx. 3,795 lb
Transmissions
135 three-speed manual / 135 Variable Pitch Dynaflow
Contract price
approx. $2,490 per car (winning bid)
Production
reported 270 contracted; 268 documented delivered to the CHP
Identifying mark
Four chrome portholes per side (Century fenders), not the Special’s three
What The Records Show
When the six manufacturers brought their cars for testing, the CHP ran an exhaustive evaluation — road, highway, and city testing, side by side. Buick won. The reason, recorded in the April 1955 issue of the CHP’s own Highway Patrolman magazine, was twofold: the Buick met every requirement and specification the patrol had set, and it came in as the lowest bid at a reported $2,490 per car. The magazine also noted with approval that the selected cars had the largest brake surface of any unit tested — Buick’s decision to fit Roadmaster brakes had paid off.
The patrol then turned its own order into a controlled experiment. The order was split precisely down the middle: 135 cars with the standard three-speed manual transmission, 135 with Buick’s new Variable Pitch Dynaflow automatic — so the CHP could compare the two in real service and settle which suited high-speed pursuit work.
There is one wonderful piece of documentation from the testing, recorded in that same 1955 magazine. During a dynamometer test, one of the Buicks put down 148 horsepower at the rear wheels and spun its wheels to an indicated 108 miles per hour — at which point the test ended abruptly, because the rubber tread physically tore off one of the tyres and flew apart.
Where we’re careful
Sources differ slightly on production. Buick was contracted to build a reported 270 cars; the figure documented in the standard catalogues and by marque historians is 268 delivered to the CHP. We state both rather than implying two cars went elsewhere, which no source supports. The dynamometer figures and the six-bidder shootout come from the CHP’s own Highway Patrolman magazine — a single specialist source, though a contemporaneous and authoritative one.
Why It Mattered
The Model 68 should have been a footnote — 268 fast police cars that patrolled California freeways for a few years and quietly wore out. Instead it became the most recognisable police car in the history of American television.
In 1955, the same year those black-and-white Buicks hit the California freeways, producer Frederick Ziv launched a syndicated series called Highway Patrol, starring Academy Award winner Broderick Crawford as Chief Dan Mathews. It ran 156 episodes across four seasons, was carried by more than 200 stations, dubbed into 17 languages, and broadcast in 71 countries. In the early seasons the CHP actively supported the production and loaned it real patrol cars — including the brand-new Model 68s.
And here is the paradox. The very things that made the Model 68 obscure — no brochure, no dealer listing, one single customer — are exactly what made it famous. Because it was a real CHP car, the show that wanted authenticity used the real thing. Because only the patrol had them, the Buick that no one could buy became the Buick that everyone saw.
Key Takeaways
Exclusivity was a contract, not a marketing plan. The Model 68 existed because the CHP wanted a body style Buick didn’t sell.
It was three Buicks in one. Special body, Century engine and chassis, Roadmaster brakes — a genuine parts-bin hybrid built to win a low-bid contract.
The CHP tested rigorously. Six manufacturers competed; the winning car had the largest brake area of any tested; the order was split 135/135 to compare transmissions in service.
Rarity plus visibility is a strange combination. Roughly 270 built, and yet seen weekly by tens of millions in 71 countries.
Four portholes is the tell. Century front fenders carried four portholes; the Special’s three. It’s how survivors are authenticated today.
Frequently Asked Questions
Sources
This article is built from period records and published automotive history. Key references behind the claims on this page:
1.
Highway Patrolman magazine, April 1955 (California Highway Patrol) — Model 68 selection, six-bidder evaluation, specifications, and the dynamometer test.
2.
Standard Catalog of American Cars — 1955 Buick production figures and body-style data.
3.
Buick marque-club research and archives (The Buick Bugle) on the Model 68 / style 4611.
4.
Published production histories of Highway Patrol (1955–59), Ziv Television — CHP vehicle loans and production practice.
Honesty note
Where a claim is debated or uncertain — such as the exact production figure, or details drawn from a single specialist source — we say so on the page. We would rather be accurate than tidy.
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