All the notes I've read tell us that the frame number is on left face of upper front downtube headstock lug.
Went to Brooklands today. Denis Jenkinson's Model 40 (with later 500 engine) has its number on the upper front engine mounting lug, about a foot below the headstock. And mine also has it on the engine lug.
Both are stamped in two rows. Upper number is '40' or '30'. Below that is the frame number.
The two models had slightly different frame sizes so it must have avoided mixups at the work to have model numbers.
Both are early 30's.
Inter frame number
- Log in to post comments
Not my bike. I don't dare…
Not my bike. I don't dare post pictures for fear of critics
All this picking up on numbers is nonsense anyway. The only thing that matters is if the numbers match the documents.
- Log in to post comments
Frame numbers for cradle frames
Most 20s and 30s cradle frame OHC bikes I've seen have their frame numbers on the lower engine mount lug.
The 20s CS1s the 30s international models 30 and 40 etc.
Certainly most rigid frame models.
There are strange exceptions with the early 30s, ( 31 and 32), CS1 stamping on the more commonly recognised by us diamond frame owners, tank mounting lug.
I am as you know one who is always suspicious of numbers but only if they are messed with to deceive. If a 30s inter has factory matching numbers I wouldn't expect the frame to have come from a 49 16h for instance, (which I have seen!) sometimes numbers are re stamped for sinister reasons and sometimes not. It bothers me if I find our after buying a bike even more.
Stolen bikes have been re stamped and given new identities.
Non matching numbers bikes have been created into matching by unscrupulous individuals.
Bikes have been stamped to suit logbooks found in order to skip registering.
Dvla sometimes insist I have been told on a frame number where there isn't a legible one.
Lots of reasons. Some OK, most not.
Anyway. Stamping of an inter in the location you mention would be normal.
- Log in to post comments
Something wrong there , the frame number has one digit too many , should be only 5 not 6.