Interesting !

Made with copper wire frame.

Small "rectangular" and thin lenses that work very well (see last few pictures).

Small size.

Measurements:

width: 4" (see picture #7)

Temple length (adjustable, see pictures): from ~ 4.5" to ~ 6".

Temple is also slightly bendable.

Very good antique condition.  There is a tiny chip on upper right corner (see picture #1) that does not affect viewing and is nor very noticeable.