
LOT 121
1939 OK Supreme 350cc Engine no. 390K/16M 8303
Sold for US$7,475 inc. premiumLot to be sold without reserve
Lot 121
1939 OK Supreme 350cc
1939 OK Supreme 350cc
Engine no. 390K/16M 8303
Engine no. 390K/16M 8303
OK - the 'Supreme' came later - was founded by bicycle manufacturer Humphries & Dawes, of Birmingham. The company experimented with powered two-wheelers in the 20th Century's early years before exhibiting a Precision-engined range in 1911. When Charles Dawes and Ernie Humphries split in 1926, the latter continued motorcycle production using the name 'OK-Supreme'. The firm first entered the Isle of Man TT in 1912 but had to wait for its finest hour until 1928, when OK-Supremes filled four of the top six positions in the Lightweight race, Frank Longman scoring the marque's solitary TT victory. The majority of OK's 1930s range was JAP-powered, the exception being the overhead-camshaft models which used the inclined 'lighthouse' engine at first and a more conventional ohc design as seen here from 1935.
With its chromed high exhaust showing hints of patina commensurate with the motorcycle's age, and tank graphics that can only be regarded as quite a bit ahead of their time, the motorcycle is a joy to behold. While the included 2002 Bill of Sale to Mr. Jacobs states that the machine was sold in "restored running condition", prospective buyers are advised that a careful recommissioning will be in order prior to enjoying the ride.
With its chromed high exhaust showing hints of patina commensurate with the motorcycle's age, and tank graphics that can only be regarded as quite a bit ahead of their time, the motorcycle is a joy to behold. While the included 2002 Bill of Sale to Mr. Jacobs states that the machine was sold in "restored running condition", prospective buyers are advised that a careful recommissioning will be in order prior to enjoying the ride.
Saleroom notices
Please note, the title will be in transit.






























Additional information
Looking for a similar item?
Our Cars specialists can help you find a similar item at an auction or via a private sale.
Find your local specialistSpecialist section


Client Services (Los Angeles)

Client Services (New York)
Auction Viewings
- 2 March 2022, 09:00 - 19:00 EST
- 3 March 2022, 09:00 - 13:00 EST
Bid now on these items
United Kingdom
Coming soon
1926 Triumph 494cc
£4,000 - £6,000
United Kingdom
Coming soon
1934 Austin Seven 65
£4,000 - £6,000
United Kingdom
Coming soon
1915 Douglas 350cc 2¾hp
£4,000 - £5,000
United Kingdom
Coming soon
1921 Triumph 550cc Model H
£4,000 - £5,000
United Kingdom
Coming soon
1916 Radco 211cc
£3,400 - £4,400
United Kingdom
Coming soon
1974 Moto Guzzi 750S
£4,000 - £6,000
United Kingdom
A Michaux & Cie Velocipede, circa 1870,
£4,000 - £6,000










