Originally invented to aid in the early development of plasma lighting and believed to be the first optical device to successfully filter polarised light waves, (however, the striated glass element has, sadly, been lost).
A distinctive take on the vintage monocle - a must for steampunk enthusiasts
Pewter, 38mm dia monocle frame with pierce-etched lens cover, (without glass), on a 20" (50 cm) curb chain with buttonhole T-bar.
Width 1.57" x Height 1.26" x Depth 2.76"
Fine English two-tone Pewter