Hi I have several Diana 50 underlever rifles (Diana made the Gecado as a house brand) and have some info on the classic gun. Write me at (dlaw1940@yahoo.com) and we can di9scuss it.
There is some info on th e 50 underlever series in Blue Book of Airguns fifth edition which I sell for $25 and pst.
Doug Law
dlaw1940@yahoo.com
http://www.bigspringguns.net