another quick update.

I noticed a vague impression on the bottom bracket shell and after scraping through the caked up paint I think it reads GB on the crank side and 238 on the non crank side but its not very clear. (I think its cast)

EDIT I just found a hand stamped number on the dropout L25546 and I also noticed that there is a half link in the chain which I thought was a bit weird on horizontal drop outs.