I picked this Simplex up last week. You all probably saw it on EBay but it didn't sell so I sent the guy a low ball offer and we came to terms.
Frame # 13314 which I think should make it a 1956 or 57. Brake light switch tab is on top of the lower frame.
It had a J motor on it with an iron cylinder. All incorrect for this bike. Motor number J6223
I have an extra M motor and transmission but what I like about it is the paint is all original and I plan on leaving it that way. A PO had put Sportsman Stickers over the original Simplex Automatic decals, I was able to get the Sportsman stickers off with some sticker remover and lots of care leaving at least a sign of the original Automatic decals.
The rags in the gas tank are wicks in case I get to mad.
Huston
hgonthehd