25-50
I just did a web search and came up with a half dozen hits. Listed in the 1964 H&R Catalog.
Good chance
50-125
10-100 usd
50-125
For trade value you can expect to get about $500. To sell out right $350 or less.
You will need to take it to a gunsmith to find out.
You will have to provide the full name of the maker.
no real value. depending on condition - $100 to $200
100-500 USD
50-75 USD