My records have,
PK681 test flown Flt/Lt Wigley 25min 8-3-46 33MU 28-11-46 RNAS Renfrew 29-6-49 Seletar Singapore 12-8-49 MBFE 11-9-50 Singapore AAF 20-7-51 390MU 7-3-52 SOC 15-4-54
PK683 test flown L R Colquhoun 15min 19-2-46 33MU 13-8-46 Pyrrhus 12-8-50 FEAF 7-9-50 MBFE storage 12-9-50 FAC3R 2-7-51 Singapore AAF 24-7-51 Hit PK681 while taxying at Tengah 29-9-52 390MU 10-2-53 SOC 15-4-54 ATC Malaya as 7150M extant Hall of Aviation Southampton
VN494 test flown W R Morgan 10min SM 19-12-47 9MU 14-1-48 FEAF 22-10-50 MBFE storage 26-10-50 Singapore AF 23-7-51 SOC 18-2-54
You will find the history of PK683 here,
http://www.spitfireonline.co.uk/popup/other3.html