I'm afraid I jumped the gun, on this one. I've only identified 2 classes (variants) of "S" or "Sugar" boats. The "Hotel" class didn't precede the "S" class, it broke then into early and later variants. The two variants, that I talked about, were the last two.
There were, in fact 51, not 10, in the "S" series and 9 Variants.
S-1, 2 & 3 (SS-105, 106 & 107) were each a one ship variant. S-1 was EB, S-2 - LAKE and S-3 - Portsmouth.
SS-108, a Hydrogen peroxide fueled boat was designated Neff Class, but never built)
The S-4 variants consisting of 6 boats S-4 to S-9 (SS-109 - 114) were Portsmouth built.
S-10 was a group of 4, S-10 to S-13 (SS-115 to 118).
S-14 was the next class built with 4 boats, S-14 to S-17 (SS-119 to 122).
The last of the early "S" boats was the S-18 variant, of which 24 were built, at various yards. S-18 (SS-123) through S-30 (SS-134) were build by EB at Fore River, MA. S-31 (SS-135) through S-41 (SS-146) were build by Bethlehem Shipbuilding in San Francisco.
If anyone wants more info, drop me an email at << mkeatingss(AT)cox.net >>.
Mike K.