These circles look like spot welds to hold the loop on.  I don't like that they show through from back to front.  I also don't like the prongs or the leather tab.   We have some buckle collectors that have more expertise than I.  Let's see what they say.    

Welcome aboard Dave.  What have you been collecting over the past 50 years?      

What are these?

i collect a few buckles. Saw this one and  it   looked good in some ways but ....... only steel Reichsbahn buckles i have seen  seem to have been chrome/ nickel plated. This one shows no signs of ever having been shiny. Stamping looks pretty crisp. Corrosion/dirt seems older than last week. Paper thin leather  tab with poor stitching and  thin leather  .... could that mean late WW2 ? Any insights on this one would be much appreciated.

Hi All. I'm a UK-based collector and been collecting over 50 years now.  Joining to continue to  learn from others. Glad to be aboard. Dave

Interesting. I agree that is very similar to the Lubeck eagle. 

I think the religious tones of this piece are interest. The St. George engraving and the fact this item involves the territory of the "Holy Land" makes me think of that maybe the engraver was thinking of the Crusades? 

Hi GUMP,   Are any of these postcards still available.  PM sent.   -Bosley

Thanks so much.  🙂

Lubek, Austria Germany! Sorry, i had in my mind Austrian Eagle... of course is Lubek Germany

Still available for FREE for anyone interested.   Cheers,   Bosley

No clue. Hand painted, took a shot at $5.