Here is a nice Sterling silver pendant by the renowned Danish silversmith Bernhard Hertz (see bio).    The chain is threaded through the integral loops, but could also be replaced by a fine leather string for an even stricter or unisex look. 

Condition:  Excellent , no visible damage

Marks: BH 925 Denmark

Size:  0.8" ( 2cm) long.  Chain is  15" (38cm) long

Year: 1970s