Cast code locations

[Paultrehberg]

Where are the casting codes on the early knucklehead cases? Inside or out side?

[Rollo]

Inside.

Tom (Rollo) Hardy
AMCA 12766

[Chris Haynes]

Cases weren't date coded until mid 1938 production.

[Speeding Big Twin]

Paul, the earliest casting date code I’ve seen on a Harley Knuckle left case is from May 1938. It is E 8 and outside. Also as you can see below, casting number 112-35 is outside.



On 112-35 cases, other examples I have of outside date codes are G 8, H 8, I 8, J 8, L 8, A 9 and B 9.


Earliest casting date code I’ve seen on a Harley Knuckle R-H case appears to be from March 1938. It is inside and looks like C 8. Casting number is 112-352 inside. On 112-352 cases, other examples I have of inside date codes are E 8, H 8, I 8, J 8, L 8 and A 9.
NB: although it seems most of the time casting number 112-352 was inside, it can at times be found outside, below the gear compartment. But so far I’ve only seen it outside on two 1936 model cases. Other 1936 model R-H cases I’ve seen, as well as 1937–39 model R-H cases I've seen, have 112-352 inside.

In another thread you asked about a 43FL serial number so I sent you a PM about that.
Eric