The only piece of advertising literature I've seen on Schoverling, Daly, & Gates is from 1912. The ad states, "available in 12ga only", or something similar.
Does anyone have info regarding production of 16ga Manhattan marked boxlocks? When 16ga became available, etc? One just popped up on Gunbroker. Seller says it has 26" uncut barrels, so my curiosity wouldn't allow it to linger. GB Auction # 390327148 if'n you wanna see.