I have been searching for data with respect to the Model 87 for several years now. Here is where it stands as of now. Please pm me if you have or know of someone who has data for those not on this list?
I would appreciate a photo of your gun like the one below for verifying your serial number and cal.
A huge thanks to those who have already contributed!
For those interested, here is a link to another thread on AVA with additional info on this model. https://www.tapatalk.com/groups/americanvintageairguns/benjamin-centennial-model-87-data-t9259.html