Vintage Czech dark green buckle and four matching buttons two tone green made in Czechoslovakia matching hard plastic dress belt buckles buttons.
The buckle is 2.75 inches x 2.25 inches x 1/8th of an inch.
The buttons are 7/8 of an inch in diameter with two sew holes.
The buckles and buttons each have an added piece that looks a bit like an opening clamshell. This adornment is a lighter green/yellow with a marbled appearance. Each piece is attached with two small metal posts - the metal is visible on the underside and looks like copper.
These look and feel like bakelite but did not test as bakelite with Simichrome.