Unknown Bulgarian cinderella
Moving outside the topic of Latin American stamps for a while, here’s a bit of a mystery that’s been puzzling me some time: a Bulgarian cinderella stamp. What makes this very interesting is the inscription, ‘допълнителни пощенски услуги’ which (Google) translates as ‘additional postage (stamp)’. My initial thought was that this might be some kind of obligatory postal tax stamp. But this item is nowhere to be found on general stamp catalogues!?

Bulgarian cinderella stamp.
Based on the looks and design, this was likely put out sometime between 1920s to 1940s. As this is imperforate, I would not exclude the possibility of this being a cut out from postal stationary neither.
As usual, any help in identifying this accurately would be greatly appreciated.
You might also be interested of related posts about Stamps and postal history of Bulgaria.

‘допълнителни пощенски услуги’ means ‘additional postal services’
@Zoran… Thanks
Any idea what this might be? I know it’s not a postage stamp per se.
I know I have seen this before but I can’t remember where… I get the feeling that it was a postal stationery, not a regular one but for a postal money order. I’m sorry if I’m wrong.
@Prahanoaki… No worries. A clue of any kind is better than nothing.
hello and happy holiday wishes to all …
it is a handsome item and i must plead extreme ignorance regarding translations but perhaps the text at the top, right-hand portion (framed by the margin, horn and “1″ that appears under the cancel and may perhaps be run through with the same red ink used for the printing) could provide further information.
i too am now intrigued!
good health and prosperity,
mike
@mike… Unfortunately that is simply the currency unit marking (стотинка = 1 stotinka)
Hi Keijo and all, thanks for an excellent site and this puzzle which Google doesn’t for once solve. Given the posthorn and the low denomination I would think this is a postal insurance ’stamp’ for a standard letter or possibly a letter collection fee/receipt from a post office. I would agree with your dating range. Hopefully a Bulgarian reader will soon provide precise information. Best wishes to all readers.
Dear all,
the stamp referes really to “допълнителни пощенски услуги”. Actually, it was used in Bulgaria after 1944 till 1989. It was used in order to pay the fee for parcels (moreover, the stamp itself has its own nominal value). At the moment such stamps are no more used.
Have a wonderful 2013
Ivan
@Ivan… Thanks