New Key Records was a Scottish label.  Judging by the few of its products, NKR - New Key Records - seems to have been either a custom pressing concern or a small independent.  Its 7" records were mainly numbered in the NKR-000s, with EPs having an 'EP' after the 'NKR'.  Albums, of which there were at least two, had numbers in an NKR-900 series.  Nat Little's single 'The Ballad Of Glencoe' b/w 'Country Roads' (S-001) had a matrix number of 'NEW KEY-1' but the only copies that I have seen have been on the GMC label (q.v.).  There was no date on it, or on Gil Tod & Tiki's 'Cara Mia' b/w 'Heart' (NKR-005), but the first NKR album, 'Laffin' Room Only' by Hector Nicol (NKR-900) is reported to be from 1976, which gives us some idea of when the label was in operation.  Two of the tracks from an EP by Frankie Farrell, 'I'm Stone In Love With You' and 'Love Will Keep Us Together' (NKR EP-002) were covers of hits from 1975, which again suggests a release date of 1976 or thereabouts.  The fact that two of the 7" releases were produced by Clem Dane suggests that he may have had something to do with New Key.  Catalogue numbers suggest that there should be at least two more NKR 7" records out there.  Distributed By New Key Records. Thanks to Robert Lyons For The Info.

76 Nat Little With Colin Marr, Organ Nats' Tryst NEW KEY S 001
76 Frankie Farrell Stone In Love With You NEW KEY NKR E.P 002
76 Not Traced NEW KEY NKR 003
76 Not Traced NEW KEY NKR 004
76 Gil Tod And Tiki Cara Mia NEW KEY NKR 005