Holy Bread Prosphora Seal or Prosfora Stamp.
In the picture shown is the top and the bottom side of the original Mount Athos Prosphora seal design.
Please note that this type of prosphora seal might not have as deep the engraved figures as the Mount Athos one.

Prosphora (Greek for "offering") is bread prepared for use in the Divine Liturgy. A portion of it, known as the lamb (or amnon) is cut out during the proskomedia which is consecrated during the Divine Liturgy to be the Eucharist, while the rest is cut up for the antidoron, the blessed bread distributed at the end of the liturgy.
During its preparation, prosphora is stamped with an image usually including IC XC NIKA ("Jesus Christ conquers"), which is maintained during baking and then serves as a guide for cutting out the lamb during the proskomedia. Prosphora can vary in size and stamp in different traditions. Generally, the Slavic traditions use smaller prosphora with a simpler stamp, while the Byzantine ones use larger ones with a more complex stamp.

Available Options:

Feature	Weight	Price
No 7650-10 16cm	0.6 kg	$12.04USD
No 7650-20 13cm	0.6 kg	$10.99USD
No 7650-30 11cm	0.6 kg	$10.46USD
No 7650-40 10cm	0.6 kg	$8.89USD