Happy Friday everyone! I have a collection of Triumph brake shoes which I need some help with. The first shoes are just marked 1092, are 1 9/16 wide for an 8" drum, the linings are also marked 1092 Triumph. Of the four shoes three are identical with the remaining one a mirror image to form a pair (i.e. put the shoes profile together and the cam and pivot faces are swapped over). The same applies to the shoes marked W1074/5. Five are identical with one the mirror image. My first question is why are the casting numbers the same for the 1092's? Secondly, because the shoes are marked 1074/5 could these be fitted 180* to each other in a TLS drum? I ask this because some are additionally marked LM4 with possibly a T on the other side.
Thanks, Phil W.