It looks like some that were engraved Post War in the shop of Kurt Jaeger in Mainz, Germany.
Done for GI's of the Occupation Forces as the German population wasn't allowed to possess firearms till later.
Kurt Jaeger was himself an engraver, but had a number of others working for him in that shop that could have done the work as well.
The shop did stock work and all phases of gunsmithing as well.
The Jaeger shop name usually went on their work instead of individual craftsman. Typical of European trades.
Take a look for the name carefully. Most I've seen are on the top strap or outside one the of the borders on the sides of the frame.
Jeager had a shop right in the Wiesbaden (sp?) R&G Club on the AF Base there in the 50's I believe. They did a good business with the American soldiers.
It could have been done freelanse as well as after the War, such craftsmen in Germany were wanting for work and the only source of customers were the GI's.
Job's such as this were priced at about $15 to $20 complete. Many had ivory grips and silver inlays as well.
Sometimes work was traded for food or even cigarettes. It was not an easy time for the population.
Paul Jeager the gunsmith that set up the gunsmithing firm in Jenkentown, PA was either a cousin or brother to Kurt.
Paul and many others sent work to Kurt's shop in Germany for years. Kurt could never be convinced to move his shop to the USA.
Dietrich Apel of New England Custom Gun Service & the German Gun Collectors Assn. is the nephew of these two. Long line of gunsmith/gunmakers in the family.
A very nice looking engraved S&W revolver.