Have you ever wondered how to identify vinyl music records that were made at the former East Front Decca / Compo record factory here in Cornwall? If so, you are not alone. Here are some pointers. For starters, from 1964 until the early 1970s the Cornwall plant used a 1″ pressing ring; note the 1″ circle around the spindle hole. It seems likely that the Compo Lachine plant was using a 1″ ring at an earlier date, but not overlapping with Cornwall. Additionally, Compo did press some l.p. s for Decca in the United States. Below are some examples of Compo records (a few may have been made at the Lachine factory rather than in Cornwall).
Below are several examples of this 1” press ring :