[Closed] Smith & Wesson Miscellaneous
Smith & Wesson CO2 Powerlets.
Courtesy of Leonardj.
Smith and Wesson offered the CO2 capsules in two sizes, as noted on the front face of the respective boxes - 12.0 grams, and 12.5 grams.
The same catalog number (No. 751) was used, so I suspect that the 12.5 gram was the earlier version, which was later replaced by the 12.0 gram version.