barrowc wrote:The large hole in the centre is a US innovation from the war of the speeds in the late 1940s. Probably most US 45s that I get have the large centre hole regardless of when they were made.candycaneboy03 wrote:btw, i love the fact that third man follows the pressing 7"s with the big hole in the middle instead of the more modern version of 45's. has a nice feel to it, plus makes it easier to hold.
45s from outside America almost all have the small centre hole and imported US ones were often fitted with an adaptor - see here
Really interesting read Colin, thanks.