Thanks for the info Hopalong. The piece is in very good condition - few scratches on one spot on the cylinder and some slight sketching underneath. Better by far than any other New House I've seen anywhere on the web.
Actually, all the examples I'm finding on the web appear to have blue frames.
Of interest, one example is etched "Colt New 38", another "Colt House 38" and con't read the third. Mine is etched "New Police 38". It is longer barrel with ejector, if that makes a difference? Every example I have seen was all blued or nickle.