I wouldn't even call them variants. To me they're all Jack Hammers. I would call the Jack Hammer a SJTAC variant, though.
Good to know. I always assumed they were a Satin Jack variant, because Busse Collector has them listed under the SJ heading. I couldn't find the Jackhammer listed.
JYD #123 The great one formerly known as Architect.
I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.
