Thank you everyone for your nice welcome!
StatesmanStamper, for you I have Denmark nr. 1, for now [top row of the picture], which is actually why I joined the forum.
[URL="https://imageshack.com/i/pm8nTJDFj]

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rod222, here are my humble suggestions:
1. I do not deal in unadopted essays. I believe that a stamp's meaning and value is given by its postal circulation, which is why I usually collect cancelled, and also why I do collect some circulated cinderellas / vignettes, if they can be shown to have been postmarked by the authorities. So, for me, the value is in the eyes of those who are looking for essays.
2. No English specialized Romania catalogue that I can recommend. As for MICHEL, I use the German versions for everything. I consider it generally good, with the following specific issues:
-> the so-called Romania occupation of Ukraine overprints, which are completely invented things, never made or circulated by the authorities;
-> they don't go too much into specials, such as the "Porto" [postmarks-that-want-to-be-overprints] applied in Moldova, and in the late 1940s during inflation, which are not mentioned.
3. What you sent is the present-day town of Viseu-de-Sus, spelled here VISAU-[probably DE-SUS].
4. Also no English catalogue for revenues.
To me, the best English resources are
www.romanianstamps.com and
www.revenues.ro .
From the links you sent, the oblong auxiliary marking "***sement" is most likely saying "VERSEMENT" = money has been sent.