A mezuzah is a piece of parchment inscribed with specific Hebrew verses from the Torah, which Jews fix to the doorposts of their homes. These verses are the Biblical passages in which the use of a mezuzah is commanded (Deuteronomy 6:4–9 and 11:13–21); they also form part of the Shema prayer.
This is a miniature charm version, with a tiny prayer inside a gold engraved oblong case, with a circular window that reveals the tiny prayer inside 
Makers mark W.H.C
Hallmarks for Chester 1893
15mm long