Perhaps i can help here.
I own a Sammy Pierce Scout. It's numbers are "68 42 30", which translates to built in 1968, 42ci (stroked 741) #30 built. It is mounted in a 249 frame and originaly came with Enfield Indian tanks and alloy fenders. I have the original bill of sale and correspondence from Sammy about the bike.
I expect to have it running in a couple of weeks.