Hi again,
NM-01 and NM-21 are stated with those numbers in the war diary of 61. V-Flottille of 6.12.42. V-6115 (I) / Ostwind arrived Tromsų (and the flotilla) as late as 11.12.42. The NM boats might very well have been planned for a transfer to the flotilla (unknown for me), but they had not been renumbered when lost. V-6116 was commissioned 1.10.44 as whaler Doggerbank (newbuilding).

Rgs Erling