unclebird,
RG guns were made in Germany by Rohm. Most people will tell you that
ALL Rohm/ RG guns are junk, primarily because they were sold for very cheap prices, and because they were made mostly of "pot metal" (some alloy of aluminum & zinc). You will usually hear the term "Saturday night special" applied to every Rohm/ RG firearm. John Hinkley shot President Regan with a .22 RG revolver, low model# (like an RG 10, or such).
There is some concensus that the higher model-numbered RGs are better than the lower numbers are. Your 66 may be "better" than a model 10, for example. I have an RG 10. It is a well-thought-out design, but not very user-friendly: it is toyish in proportions, and I am a full-grown man. Only those parts which need to be made of steel are made of steel. My barrel is now a little wobbly, after who knows how many rounds that were shot by the previous owner.
Rohm Gun is still in business. They now make "signal guns", flare guns, and air guns:
http://www.roehm-rg.de/?&L=1
...including the ultracool "Desperado Guitar Case":
Way back when, Rohm produced some of their guns with almost any other company's name on them.
Finally, please do not let any of what I said reduce your enjoyment of your 66. Just be aware of the reputation that precedes these items, and shoot the snot out of your new gun!:bthumb:
BigLoop22