I recently purchased a Malta passport from 1920 and it contained the following US consular revenue stamps, cancelled at the US Consulate in Malta on 1 September 1920. They also have an embossed cancellation from the same consulate.
I don't have a catalogue which covers US revenues, but through the website https://www.stamp-collecting-world....onsular.html
I think I identified them as Scott RK17 and RK18 (they are perf 11). Can anyone confirm if the website is reliable and if the identification is correct please?
What would be the approximate market value for these stamps used on a document? I suspect that they're not rare (quite a few are available online at the moment) but it would be interesting to know nonetheless.
Cancellations on some countries' consular stamps are sometimes sought after just as much as (if not more than) the actual stamps themselves - the UK comes to mind since a wide variety of cancellations from around the world can be found on its Consular Service stamps. Is this also the case in the US, or do collectors focus only on the stamps rather than the cancellations?
Finally, do any revenue collectors here have US consular stamps used in Malta? It would be great to see other examples!
Any other comments or further information would also be greatly appreciated. :)