They have no erasers- so the users aren't allowed any errors--
Thanks for the re-correction Col. Day. A segue into "Other Doubles" will verify Simmons existence. You are right on target, Sir- with the details of their work and ribs for Winchester Model 12's. The late Ernie Simmons may also have lead John Olin into altering the M21 for the .410 bore, and that lead to the later 'flat sided" Custom M21 series.
A few years ago I sold a set of 28" Nitro steel barrels- extractor- choked M&F to a gentleman in Iowa. His father had a Ideal Grade 12 with single trigger and ejectors, hunting rabbits in the Winter the right tube burst from a plug of snow- about 20" forward from the breech.
He had contacted either Briley or Kirk Merrington- they could "mono-bloc" new tubes from the breech stubs from the damaged barrels, new ribs- aprox $1900 cost range.
I suggested Simmons as they are close to his Iowa home-sent the set of barrels directly to their gunsmith for evaluation. Long story short- I sold him usable barrels for $450- another aprox. $350 later he had a usable ejector 12 Smith back in his possession. According to him they did a first rate job-