Hi! Photos aaf410 and 411 can be purchased by contacting DAVID RILEY at
info@minibusales.co.uk , and he offers e scans or prints from the glass plate negs. I agree about the date being circa 1940..perhaps David has the captions? There are some more military shots, with pre-war Army civvy-registered coming to mind from probably the equivalent of the ISDT (including in Germany!).