call the ruger factory. the number for the one in prescott AZ is 928-778-6555. they will transfer you to where you need to be. they only sell replacement model clips that aren't as nice as the original. but it works.
Primarily in the magazines; Mark II has a bolt hol open also
Ruger's web site has sn tables.
Ruger has sn data on their web site.
No
Ruger has manuals you can download for free. If that doesn't help you, find a gunsmith. The Mark 1, while not diffcult to reassemble, does require you to "feel" for one part as it engages. It is hard to describe, but, the owner's manual does a good job.
Ruger's website has a sn function.
If it's a MK II, it will be marked as such.
9
50-200 or so
Go to the Ruger website, Customer Service, Historical Data, find your model, and look up the date of manufacture.
Ruger's website has sn tables that will answer your question.
If the Ruger website is working, it has sn data on it.