The Ruger 10/22 sold many units in 1970 and was and still is extremely popular. In 1970 it retailed for about $50. I bought one in 1973 for $56 brand new. Condition is everything but even one in very good condition does not command a high price, no more than $50. a new on can be had for under $200.
50-200
75-300
50-200
50-200 usd
150
A Ruger 10/22 with that serial number was made in late 1970. This information is available at Ruger's website, www.ruger.com.
About 200 USD
10-200 USD or so
100-1000 USD depending on specifics
depending on which variant it is and assuming 99% condition anywhere from $150 to $250
Yes, Ruger made them
What exactly are you asking?