SS P08

My friend has an old P08 (DWM), however in a very poor state, with some markings I cannot immediately identify.

S/N is 2637, WaA103, 1918, SS-runes in a rectangle on all main parts, flat wooden grip plates, "gesichert" painted in red.

On the underside of the barrel, below the S/N, is stamped "8,89" ?

Cannot identify it from the technical and general information available in this forum.

Any help?


Thanks,


Peter