Three Coins, New to the hobby, Fake or Real?

[Igor B2]

I bumped into this seller privately (not over eBay) selling these three coins. The seller backs the coins with story - bought in Israel few years ago. Since my gut feeling is telling me to check this first before buying, I would appreciate any insights that the community may have.

Apparently, there is silver tetradrachm, 1623 Austrian 1 (dukat?) 14-18K (weight 2.2 gr)?, and Ceasar Augustus 22-24K (8.2 gr)?, without numbered value.

The reading off the austrian coin:

right    FERDINAN II DG   
center 1
left      MSAGH BOREX

other side

right    APCHID AVS DVX
center *
left      BVR MAR M 1623

[Steve Minnoch]

The Augustus not only looks very wrong, but as far as I can tell, is of an unrecorded type.

Steve

[slokind]

Only a photo, and not quite in focus, but that Owl almost could be a cast from the one in the Athens Num. Museum collection on which the Greek 1-euro coin is based (at a reduced scale).
Pat L.

[Igor B2]

thanks for the info, I am sorry I do not have better pictures. the austrian coin looked suspicious to me, it did not resemble gold at all. Ceasar coin looked 22K gold. the greek coin made me uneasy. that is how I joined this forum...