One number is the year and I think the other number is the week number in the year.
Hilary Stone, Bristol
Raoul Delmare wrote:
> By the way , speaking of date codes . . .
>
> On many of those Atom-Normandy-Maillard hubs ,
>
>> From the late-1960's ,
>
> Up through the early-1980's ,
>
> On very many French bicycles ,
>
> And Schwinns ,
>
> And Raleighs ,
>
> I used to think if I looked at a hub shell , and saw something like 10 72 ,
> or 72 10 , that it would obviously indicate a manufacturing date of
> October 1972 .
>
> Then I looked at more of those hub shells . I've seen numbers such as 15
> 72 , or 26 73 .
>
> Well how about that ! Obviously , on at LEAST SOME of those hubs , one
> of the numbers is the year , and the other number is a "batch number" or a
> "lot number" or maybe even a "building number" or a "work-station number"
> , etc. , etc .