20-100
10-100 USD or so
That is R G 10 on the grip. Rheinmetal Gemeinshaft. In general, low $$$ guns of indifferent quality. Value may run from $25-$50. Does not have a reputation for reliabilty or durability. Sorry
Gertenberger made inexpensive revolvers in Gussenstadt West Germany in the 1950s. Most were banned from import when the 1968 Gun Control Act was implemented. Values, sadly, are low- $40-$75- maybe $100 for a new-in-box specimen.