Tim, thanks for your posting. There is some overlap in dates with the UK National Archives Design Register listings from 1864-71. They may or may not have information which would help you. We have them linked from the TCC website, but here is the direct URL:
http://www.nationalarchives.gov.uk/designregisters/. It has been some time since I last looked at this resource and it is possible that by now other years are included. Please let us know if this helps, and if you find other years.