Win 1200 or 1300; are the recievers marked W/model? Where?

[Redie Fredie]

I bought a Winchester Shotgun with a 120 Ranger 12ga smooth slug barrel and side mount scope on it. I thought it was a 120 (aka budget 1300), but there are no marks on the reciever other than the serial number? Are there model number markings somewhere on the 1300 recievers & 1200 Recievers?

[Redie Fredie]

The basic difference I see between the 1200 and the 1300 is the ejector retainer; on the 1200 there is a pin hole on the Left side-upper rear corner, the 1300 does not-it has an inside the left side retainer at fwd lower.

So by the pin hole on the left side I'd say my shotgun is a 1200.
Maybe they came up with the 120 Ranger originally to use up 1200 parts.
Be nice if they marked the reciever with the model number in case one needs parts!!!