The Vulcan 30C was the differential-acting counterpart to the single-acting #2 hammer. Specifications are below. For use with the wave equation analysis, see GRLWEAP Accessory Specifications for the Vulcan #2 and 30C Hammers.
The general arrangements are interesting not just for the 30C but to explain features and variants in the Vulcan product line.
vulcanhammer.info 
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