A quick call to Customer service should get that cleared up for you. We are unable to provide any information beyond that. Ruger does not produce firearms in serial number order. Also available is a two-volume Reference of Ruger Firearms giving extensive production numbers and serial number information. Also, within a model family the same serial number prefix may be used to produce a variety of different models, all in the same block of serial numbers. Mini 14 Serial numbers and year they were produced Did discover that I should be looking for a 581 series over a 580 series but hard to tell what series a mini is by looking at it. Ruger does not necessarily produce firearms in serial number order. If you searching for special discount you need to searching when special time come or holidays. Dougan, in 1966 approximately 600 Super Blackhawks were factory fitted with 6 1/2' barrels in the serial number ranges 24xxx, 25xxx, and 26,xxx.

According to my reference 'Guide to Ruger Single Action Revolvers Production Dates 1953-1973' by John C.

Ruger blackhawk serial numbers