Frank Giorgianni is a very private person. He has not produced any other “production” artwork for any other firms. However, he has created countless “original” artworks in many forms including etching metals, scrimshaw on various articles, as well as traditional oil and acrylic paintings. With respects to the Scrimshaw line from Schrade, Frank Giorgianni created a scrimshaw artwork on a knife in 1975 for demonstration. The idea was adopted and by 1976, the first scrimshaws by Schrade were produced (two different artworks to be exact). Frank’s name or initials appear in most of his work, but some of his artwork did not have any form of marking to denote it was his work. Frank continued creating the artwork for Schrade’s scrimshaw line until 1992 when he retired. So, if you have a Schrade Scrimshaw produced between 1976 and 1992, you have Frank Giorgianni’s artwork. In addition, although he retired in 1992, Frank Giorgianni provided Schrade with some artwork after his retirement. (The above info came from his youngest son.)
I did some research on recent prices around the web, and your 1979 versions are selling for $75-$125 currently, with the norm being around $80-$100. Nice buy if you didn't pay a bunch for them.