I hate to be this guy , but this list is incomplete and you have made a major oversight.Most importantly the crosman 3100 is not a pump gun, it is a break barrel Springer made in Spain by cometa. I brought this up a couple of times, but I guess you missed it.Secondly , the pump master 760 was a modern plastic fantastic and I'm sure you were really intending to list the first variant powermaster 760.
Is it fair to call the Avanti a pumper since you only get one? Adding an SSP throws some FWB and Anschutz into consideration wouldn't it, unless this list is all American.
#18 will be replaced with; Crosman 760 Powermaster (1st variant). #25 will be replaced with; Crosman 66 Powermaster (metal receiver). Both were on the list.
Awesome! You exhibited some incredible perseverance in seeing this list through to fruition. This will be an excellent resource for new and old enthusiasts alike. I know it's gotten me excited about the classic crosman pumpers.
Good Job Marty ! Nice List ! Best Regards - Tom