An extremely rough guide to union tags. There are other unions whose tags are not represented here. Companies and tailors used what tags they had on hand, so there is overlap between different patterns of tags, and there are always exceptions and flukes.
1934 (1934-1936) Not pictured: same as 1936 and 1939 tags
1949 variant (1962-c.1976 ) I’ve seen examples of these on menswear dated into the 1980s, despite the union merging to form the ACTWU in 1976.