Geoff, that's what they look like to me, like they'd match the reprinted Commonwealth albums. One can locate a set covering 1840-1970 on
ebay, but that's about all. I know at one time they had imprinted binders and pages right up to date for them. I think they did intend them to match their other albums and planned to phase out the larger-paged Windsor albums and binders. Somehow they didn't catch on and a full set seems impossible to locate. Gibbons just lists a few supplements, blank pages, etc on their site. DeWaulders and the other site do not list them at all.
These albums have a smaller page size than the regular Windsor album.