Time for another update:
Added machines in bold. Test number, followed by model & serial number, then country of residence...
Pre-1937
594 - MG 141 - UK;
1041 - RB 7231 - UK;
1313 - JY 107 (bobbin sander) – Australia;
1322 - DJ 361 (bandsaw) - United Kingdom;
1359 - MN 20 - United Kingdom;
1450 - DH 122 - UK;
2000 - RC 376 (buzzer) - New Zealand;
2085 - ME 239 – New Zealand;
2315 - NB 216 (knife grinder) - UK;
2725 - DN 169 - Australia;
2949 - EV 580 - New Zealand;
3197 - RS 133 – New Zealand (RIP);
3719 - MJ 244 (planer/thicknesser) - UK;
4417 - DO 241 - United Kingdom;
4501 - MA 263 - UK;
4616 - PKA 266 – UK;
4653 - EV 793 - UK;
4713 - DH 163 (bandsaw) – New Zealand;
4734 - MD 343 - UK;
4737 - PD 351 - UK;
4782 - EV 815 (spindle moulder) - UK;
4818 - PL 105 (dimension saw) – UK > USA
5029 - RTA 148 – UK;
5164 - EPA 485 United Kingdom;
5391 - MN 133 - Canada;
5812 - DO 253 (bandsaw) - UK;
6281 - JV 139 (bobbin sander) - UK;
6556 - CC 847 (RAS) - UK;
6759 - KH 253 - UK;
6827 - MD 464 - UK;
7336 - EPA 646 (spindle moulder) - New Zealand;
7337 - PKA 200 - United Kingdom;
7503 - JV 131 - United Kingdom;
7665 - ME 513 (mortiser) - Australia;
7671 - RS 115 – UK;
7784 - SOA 350 - UK;
7974 - PD 454 - New Zealand.
1937
8446 - MJ 413 – United Kingdom;
8567 - RA 599 - United Kingdom;
9067 - PKA 390 – Australia;
9335 - RBA 183 (buzzer) – UK;
1938
9510 - MA 137 (morticer) - UK;
9650 - PKA 405 – Australia;
9783 - PKA 412 - UK;
10166 - EKA 386 - Australia.
1939
11454 - RU 161 (lathe) - UK;
11455 - CC 1059 - New Zealand;
11704 - LSA 592 (Router) - UK;
1940
13678 - SNR 224 - New Zealand;
14371 - MS 212 (saw) - United Kingdom;
14542 - RDA 237 (buzzer) - New Zealand;
14594 - PKA 554 - Ireland;
14979 - EUV 164 - UK;
15111 - RDA 441 (buzzer) – Australia;
16264 - LSA 1258 - United Kingdom;
1941
17093 - PKA 607 - UK;
17392 - PKA 613 - UK;
1942
18327 - RS 579 - United Kingdom;
18548 - JTA 248 - United Kingdom;
18695 - PKA 643 - New Zealand;
18929 - MA 482 - UK;
1943
19917 - EPA 1218 (spindle moulder) - United Kingdom;
1944
22583 - PKA 725 - Scotland > Canada;
22749 - RS 712 (lathe) - South Africa;
23242 - RMA 917 (under & over) - New Zealand;
1945
24538 - REA 315 (24" thicknesser) - UK;
24671 - PKA 785 - Australia;
24965 - MA 490 (mortiser) - UK;
25031 - PKA 800 - New Zealand;
25215 - JQ 440 - United Kingdom;
25539 - RS 815 - New Zealand;
1946
26557 - LQA 413 - USA;
26763 - MG 699 - New Zealand;
27390 - MA 563 - United Kingdom;
27476 - RD 595 - United Kingdom;
1947
27918 - MA 580 (mortiser) - UK;
28379 - REA 403 - New Zealand;
29157 - PKA 969 - UK;
1948
30171 - LS 1925 (router) - UK;
30253 - PKA 994 - UK;
30459 - LQ 482 - United Kingdom;
31145 - RD 694 - New Zealand;
31435 - RE 485 (buzzer) - New Zealand;
31669 - CQ 123 - United Kingdom;
1949
34218 - MA 853 (mortiser) - UK;
34664 - RS 1047 (lathe) - UK;
34832 - PK 1154 (saw) - New Zealand;
35284 - RE 668 (thicknesser) - Canada;
35301 - RB 734 (buzzer) - New Zealand;
1950
35560 - RB 745 (buzzer) - United Kingdom;
35723 - PK 1202 - UK;
35836 - WS 240 (pattern mill) - Australia;
35844 - RD 855 (buzzer) - UK;
35898 - RR 142 (buzzer) - New Zealand;
36021 - RTA 339 - New Zealand;
36376 - RT 357 - New Zealand;
36408 - RE 705 (thicknesser) - New Zealand;
36554 - PK 1231 - UK;
36572 - PKF 108 - Canada;
36796 - PK 1250 - South Africa;
37023 - PK 1271 - USA;
37264 - PK 1277 - Australia;
37564 - RS 1126 (lathe) - UK;
37727 - CQ 237 - Australia;
38139 - MG 987 - New Zealand;
38305 - SQ 319 - New Zealand;
38458 - FD 799 (five head moulder) – New Zealand;
1951
38946 - CC 2388 - New Zealand;
38990 - RT 361 (lathe) - UK;
39677 - SQ 350 - New Zealand;
39926 - MF 939 - New Zealand;
39932 - MA 1119 - UK;
40404 - RTA 405 (lathe) - UK;
40523 - PK 1410 - Canada;
41072 - RS 1233 (RS 10 lathe) - Canada;
41075 - RS 1236 (RS 6 lathe) - Canada;
41145 - RTA 380 - New Zealand;
41376 - RM 2039 - Canada;
1952
41542 - WS 267 (pattern mill) - first machine test no. for 1952
41563 - MA 1195 (morticer) - UK;
41587 - SP 610 - Australia;
41689 - PK 1437 - Canada;
420256 - PK 1445 - Canada;
42082 - RS 1268 (RS 8 lathe) - United Kingdom;
42324 - LA 372 (drill press) - United Kingdom;
42337 - RB 876 (buzzer) - New Zealand;
42413 - CC 2589 (RAS) - Canada;
42461 - PK 1451 - Canada;
42578 - RS 1291 (wood lathe) - Canada;
42636 - RB 886 (buzzer) - New Zealand;
42687 - CK 1646 - New Zealand;
42825 - RR 299 (buzzer) - New Zealand;
43686 - PK 1479 - New Zealand;
44455 - RJ 1259 - Australia;
1953
45347 - LQ 674 - New Zealand;
45658 - SR 1578 - UK;
45723 - RS 1404 (lathe) - UK;
45839 - RS 1409 (lathe) - Australia;
45963 - RE 1104 (thicknesser) - Australia;
46020 - RS 1415 (wood lathe) - Canada;
46212 - JY 498 (bobbin sander) - Canada;
46284 - NQ 312-S - Canada?;
1954
48966 - LM 1266 - UK;
49057 - MA 1381 - Australia;
49379 - PK 1702 - Canada;
49642 - MA 1395 - Australia?;
49784 - PK 1718 - Canada;
50149 - RX 107 (30" thicknesser) - United Kingdom;
50585 - FD 1125 - Canada?
50651 - SQ 641 - United Kingdom;
1955
50716 - PK 1754 - New Zealand;
50923 - EQ 572 - New Zealand;
51434 - PK 1778 - Canada > USA;
51843 - PK 1794 - USA > Canada;
51952 - RTA 440 (lathe) - UK;
52626 - WX 250 - Australia;
52712 - EQ 736 - New Zealand;
1956
53575 - RZ 213 (buzzer) - New Zealand;
53723 - PK 1863 - Canada;
53792 - RK 282 (thicknesser) – USA;
54000 - MA 1503 - Australia;
54151 - LS 3018 - United Kingdom;
54256 - PK 1882 - USA;
54421 - PK 1887 - UK;
54425 - PK 1892 - Australia;
54477 - PK 1899 - Canada > USA;
54478 - PK 1900 - UK;
54521 - RM 2817 - New Zealand;
54580 - JY 569 (bobbin sander) - Canada;
54581 - CC 3253 (RAS) - Canada;
54621 - EQ 871 - Australia;
54688 - PK 1916 - Australia;
55049 - PK 1947 - Australia;
55228 - LQ 865 - Canada;
55576 - CC 3292 (RAS) - New Zealand;
55642 - JY 587 - United Kingdom;
55670 - PK 1975 - Canada;
55676 - PK 1982 - UK;
1957
56040 - RS 1777 (RS8 lathe) - Canada;
56424 - EQ 1024 (spindle moulder) - UK;
56545 - EQ 1016 - Denmark;
56761 - EQ 1052 - United Kingdom;
56837 - EQ 1050 - United Kingdom;
57045 - EQ 1061 (spindle moulder) - United Kingdom.
1958
57992 - BCK 57315 (RAS) - New Zealand (RIP);
59000 - FM 130 (buzzer/thicknesser) - UK;
59352 - JV 562 - United Kingdom;
59402 - MF 1521 - United Kingdom.
1959
60589 - DR 1624 (bandsaw) - USA;
61036 - RZ 352 - Canada.
1960
62439 - JTA 888 - Canada;
62563 - EKA 1339 (5-head tenoner) - UK;
62596 - EQ 1632 - United Kingdom;
63449 - EQ 1747 - Australia;
63527 - JV 594 - USA;
63537 - RX 109 - Australia?;
63755 - MF 1658 (mortiser) - New Zealand (though with Aus. dealer tag).
Note that PKA 200 has test number 7337, while presumably newer PKA 266 has earlier test number 4616? But I've checked PKA 200 (photo of tag below) and Auscab checked PKA 266 at the time it was listed on eBay - so I guess that's an anomaly we'll have to decipher in the future.
Cheers, Vann.