Hello Guys, just want to share with you my recent acquisition. "H.A. stempel." As far as I can find ( thanks Ludger) it was an experimental stempel, used in a really short period. This one seems to be the earliest known use. However I posted here since in the back, has this "Börse" stempel. I never saw it and just want to know if anyone saw it. Got it. Thanks in advance for the information, and sorry to write in english (I don't speak german). Best Regards Luis