Ah, that's a 1954(December) Sauer Modell >>Kim<< offering. By 1958/1959 it was to be the staple workhorse platform in 16 & 20 bore. 12 bore was available in 1958 and by 1959 the 12 bore was an option warranting an extra fee & I think it may have been equipped with ejectors & a single trigger. Typically though, post WWII Sauers had the Modell Nr. stamped on the aft lug? For now I have no idea how the Sauer Modell Nr. >>Kim<< / >>Sauer Kim<< acquired its name but it was an effort to utilize the Kerner - Anson overhanging scear platform of the Sauer Modell Nr. 8(pre WWII or post WWII??) and lower the cost by eliminating the Greener Crossbolt & sideclips. At the time, they gave that although they had eliminated the Greener Crossbolt that they had maintained the same strength / lockup by beefing up the underlugs???? They stated that the Brits had abandoned the Greener Crossbolt & they wished to follow suit.

Cheers,

Raimey
rse