Design classics - bottle openers by Futagami based in Takaoka Japan.

"Frame" is a simple bottle opener, where the hairline on the outside and the finish on the inside is the finish of the casting. 

"Crescent moon" and "Eclipse" are forms that at first do not appear to be bottle openers, but are surprisingly easy to use . Can be attached to the bottle.

Eclipse (shown bottom right)
length: 77.5mm
width: 60mm
height: 6mm

Crescent (shown bottom left)
diameter: 65mm
height: 10mm

Frame (shown at top)
length: 140mm
width: 15mm
height: 20mm