Sauer Shotgun Model?
 

New to me JP Sauer Ejector 12ga with 28 1/2 barrels choked full. Flats are hard to read, took the best pictures I could.

Additional pictures
 

Additional pictures

Last pic with SN
 

Serial number

Water table?

Best pic

Robert
The barrels were chambered for the 2.5 inch 12 gauge shot shells (12/65mm). Suggest you post your questions & photos on the German Gun Collectors Association site. You will get answers.
Jim

Can't make out too much detail but it appears to me to have been made during the cold war period. Solid guns but the workmanship was generally more crude than their golden years.

The barrel flats are marked 1244
The shotgun was made in December of 1944

12-1944 yet the gun was intended for the English speaking market
V-E Day wasn't until 5-1945

Cornell Pubs has a 1930 catalog repro which might show the model
https://cornellpubs.com/product/3327/

This is a Sauer Hawk (Habicht) shotgun, made entirely by machine from Krupp steels. It is a cheap standardized shotgun with an automatic safety. It was available in 12-gauge. 16. 20, as well as in small sizes with English stock or pistol stock.
Barrel locking is triple locking.
The safety is automatic (on the barrel shank). The triggers were made in one piece with strikers. There were no cocking indicators.
Hawk” was available in 12, 16 and 20 caliber. The weight of the 12-gauge shotgun was 3.1-3.2 kg. The “Hawk” model became the basis for the development of the series of triggerless shotguns with horizontal barrels and Anson-Dilley locks.

Your shotgun is made with ejector, judging by the markings of 12-gauge with 65 mm chambering (marking 12/65), was manufactured in December 1944 (marking 1244) and tested on nitro powder (marking N with eagle).