Below are photos of an older (late 1920s-'30s) copy of an S&W M&P. This gun was made by the Orbea firm in Eibar. The company began before 1880 as Orbea Hermanos (Brothers) but sometime after 1922 the name changed to Orbea & Company. The firm ceased making guns in 1930..
This revolver is marked as follows:
Bbl left side: CAL 38 LARGO
Bbl Top: ORBEA Y CIA SENC EIBAR (ESPANIA)
The caliber is .38 Special. The "Y" following Orbea means "AND" and "CIA" is the abbreviation for "COMPANY." I do not know the meaning of "SENC," and will welcome a translation from anyone who does know what that means.
There is also an export stamp on the right side of the frame forward of the sideplate FABRICADA EN ESPANIA meaning "Made in Spain." I think this was a factory marking.
The most interesting mark is on the backstrap, identifying this revolver to the Provincial Police of Buenos Aires (Argentina). If anyone is curious as to how this we l-traveled gun came to the USA, there is an import stamp on the sideplate just above the trigger: Vam Dist. Co, Wooster OH. Apparently, a group of surplus revolvers was imported into the USA sometime during the 1970s.
The barrel on this revolver is 4-1/4" long, and the grip frame is slightly longer than an S&W K-frame by a quarter inch or so, as can be seen in Photo 3. That photo shows a standard S&W Service Stock lying on the Orbea frame with the bottom of the frame clearly exposed.
The lockwork of this revolver is a copy of the S&W 1905 Third Change, with rebound slide/internal coil spring, spring-loaded plunger in front of cylinder stop with screw in front of trigger guard and leaf mainspring with strain screw. There does not appear to be much in the way of a hammer block, & I would avoid keeping a revolver of this type with a live round under the hammer.
This particular gun has a very worn finish but the bore is ok