If you like coins, medals and tokens with ship motives follow my new instagram account with regular updates @numisnautiker
From time to time I sell some coins on Ebay make sure to follow me @apuking on Ebay.
It is usually very hard to attribute bracteates somehow. Most precise thing achievable is attribution by ruler which is done by historians/archeologist who do not always must be numismatist - that would explain the information limbo.
I can tell you that none of these is Bohemian as far as I know. But you probably knew that before.