Maker of this buckle,please???

[FestungSpanien]

Hi pals
Just bought this nice buckle and have no doubt of its originality but as it bears no markings at all I would like to know if some sharp-eyed collector would give me a hint on who the maker of this buckle is according to its detail and construction.
Thanks
Ace

[FestungSpanien]

a

[FestungSpanien]

b

[FestungSpanien]

c

[musketeer]

IMO it looks like an Overhoff buckle.. but I think the leather tab don't belongs to this buckle..It is fixed in the wrong way..I mean the short side must be upside.

[FestungSpanien]

Yes,you are right.I compared it to other buckles and seems to have been sewn upside down, but you can be sure this was originally done,because it seems to have been there forever.
Thanks
Ace