Thanks, Terry:
From searching here and seeing several helpful posts and photo's, that S&S one with "&" stamp on top, front appears. Seems S&S also had two versions.
There seem to have been at least 15 different block versions I that have found, some as old as the 1880's into the 1920's and most fairly modern from 1980s onward.
Again, THIS Forum is so helpful. Got to dig, but very worthwhile.
Regards,
Kevin