Hi All.
@blackcat ,Serge, thanks for the explanation (-:
@Welbike , Lex. I will be most interested to know what you find. I would have expected K4 (Q4, 1941), but it could be L1 (Q1, 1942) for the reasons below. Your response could help prove/disprove this.
I only have three MF frames listed, including yours. Of the other two, one is an L1 (Q1 1942), and the other L3 (Q3 1942).
For later contracts, the original hub dates usually fall just before the quarter the bike is mde, if it's produced early in the quarter, or during the quarter the bike is made, if it's produced later in the quarter. And there will be some mixing between the two quarters in mid production.
e.g, a bike made in April is likely to have a Quarter 1 brake, May, a Quarter 1 or Quarter 2 brake, and June a Quarter 2 brake.
This is logical due to them being supplied by an outside company, but is also a little simplified, in that if Columbia or Huffman knew that they had a big contract, they'd order the brakes, and the necessary number may have been supplied months before the bike was made.
For the surviving MF frames. L3 is Q3 1942, and this is really too late. I have notes of brakes of the same date being fitted to September 1942 Columbia G519, and Huffman don't appear to have had a contract late 1942, so I think it's been swapped in from a later bike or as a spare.
L1 Is Q1 1942. I have no other Columbia G519's listed with an L1 brake, though I do have two January 1942 Huffman's listed with them.
So, here's my theory, to be shot down if necessary... (-:
We know the MF's were built in December 1941, and that the brakes are slightly unusual being the 10 guage spoke size, so not quite 'off the shelf'. Perhaps they were ordered in December for the MF's, but not made and delivered until January, hence the L1 date stamp?
Let's see...
Thanks, Best Regards,
Adrian