Hello Slim60,
The tag is missing, it would have been mounted on the front of the tank just under the ignition timer handle. You should see the 6 holes for the drive
Pins that held it in place. The motor looks to be a 1924 or 25 Elto Lighttwin 3hp model C or D. ( D being a longshaft ) tough to tell by the angle of the
Photo. The leg on the C would measure approximately 25" to the bottom of the crankcase, the D would measure approximately 31" to the bottom of
the crankcase. Once cleaned up and dialed in they are great motors. I have several of these in my collection and enjoy running them.
Respectfully