Boito stainless(?) Model Pump Manual

[wallym]

I would appreciate help from anyone familiar with the Boito Model Pump distributed in Canada by Bell. A manual would be very helpful as it requires disassembly and probably parts. My efforts on Facebook, the Net and an attempt to get assistance from Bell, the distributor, have been futile.
Much obliged for your attention.
Walter Peterson
User name - wallym
Email gopherbloke@ yahoo.com

 

[smoji]

The manual for the Mossberg 500 would likely be useful.
Some parts are likely interchangeable.