Aluminium canteen cup marked RFI 42 named Gefr. Fursine

Rare variant small black painted aluminium canteen cup in very good condition. This type of cup is often encountered on 1L Labeflasche but appeared on multiple type of canteens throughout the war. This example is nicely marked RFI 42 which indicates production by Rudolf Fissler GmbH, Idar-Oberstein in 1942. This example is nicely named Gefr. (Gefreiter) Fursine. Rare aluminium cup which is extremely hard to find as a spare!