Old European Post-Cards

Hello, I've popped in here a few times in the past with some stamps, all from a big box from my Austrian relatives. Most interesting are these mixed postcards, mostly from Europe. I have tried to pick the most interesting ones, but obviously I don't know what I'm doing and I can't accurately pick which ones are "good". Anyway, basically: what are these, and are they worth anything (sorry, I had to ask)? I'm not going to sell them because they have been given Heirloom Status, but it would be nice to know if there's anything here that should be kept in a safety deposit box instead of a normal box.


This one looks like an overprint (?)

Here's a Czech picture postcard from the little town of Piesling, not Riesling. I'm 1/16th Czech, but I couldn't tell you if I have family there or not.

These Japanese ones certainly didn't get mailed to Vienna, so I assume they were purchased.

I thought this was notable because the printed-on "stamp" design is raised paper, and it's in good condition.

The stamp and the postcard are the same!

This one also looks pretty well-preserved.

Deutschosterreich makes me think that this is right after World War I.

This is the most notable (to me) because it looks like some kind of specially marked cover. The cancel looks too picturesque to be normal. Does anyone recognize this?

I finally found the correct way to post images. Sorry about the awkward delay before!

I'm decent at coins, so I know countries and currency names, but when I look at these stamps I remember how little I knew when I started out with that other hobby

Thank you for whatever help you can give, and I'm sorry if I'm going about this completely wrong!

In my view the most intersting are the first (Austrian Empire)and the last (Second Austrian Republic)cards. The first,is an updated stationery with a face value, raised from 8 to 10 heller (Austrian crown cents) defacing the first printed stamp and printing a new one.
The last, is a commemorative postmark from an Agriculture show, philatelic, but very well stamped.
I don't know much about the others: two are Japanese or Chinese (one seems to have had a stamp removed), one is from Romania, another is from Czechslovakia, from the First Austrian republic (1918/1936) in very poor condition and two from Hungary ("Magyar Kiraly") one of them with an embosed stamp.
All of them are very nice postal items, but nothing I would keep on a safe, I'm sorry!

They are Japanese - hence the pawlonia flower and denominations in rin and sen (10 rin -> 1 sen -> 0.01 yen).

Good to know. I'm not that good at stamps, but I have got the hobby mindset: so I was expecting something like "not worth a lot, but very nice, good start to a collection, hope to see you around here some more, etc.". I have at least twice this amount of other, less immediately interesting postal-cards still unphotographed, so I'll try posting those and hopefully I can get to the bottom of this pile! Are these printed postcards considered to be "honorary stamps", or are they less commonly collected and sold?

Yes, these "printed postcards" or "stationary", as we call them, are very collectible and the old ones (like yours!), gone thorough the mail, more sought than regular stamps. I personally, prefer a good postally used stationary postcard rather than most stamps.

I am not so sure, but the postmark on this one looks like "Zagreb".

This card has been printed bilingual - on Hungarian and Croatian languages.

I think Zagreb is correct for that one.