That number, if an Ideal, would put it with only 367 other Ideals made in 1939, with WWII already pounding on the door. There may not have been time to put much engraving on. frown

You state no other markings/numbers- I would be surprised if the finished bore diameters, in mm, are absent from the tubes just ahead of the flats.


Mike

Tolerance: the abolition of absolutes

Consistency is the currency of credibility