I have a used Victoria 2p Lilac with Twelve holes perforated each letter O & S.
My question is "Do I need a specialised Australian catalog to find out value etc? My on line SG does not help nor Scott's 1840-1940 specialized. would appreciate any answers.
The ACSC lists these, but you need to know whether the watermark is V4, V5, or crown double-lined A (and watermark orientation -- these can be inverted or reversed) and the exact perf. The perfs on these are horrible to distinguish. The perforators used were line 11, rotary 11.75 x 12.25, comb 12.4 x 12.2, and line 12.4. There are also mixed perfs (one perforator does the top and bottom and another does the sides) and compound perfs (in this case, perf 12.2 top and bottom, perf 12.4 at the right and perf 11 at the left -- sheesh!). There's also a thin paper variety.
I sold all of my Victoria to Les Molnar a while back so that I wouldn't have to worry about such things!