Ivory Sierra Uniline wallplate I have machined the opening for a standard Decora / GFCI size cutout in. 

You will have trouble finding this plate at the hardware store!

Comes with screws.  Note these plates are 50+ years old and fragile.  Do not over tighten the screws or the plate will break! 

This is cut out for the standard -modern- rectangular cutout.  Will not fit the taller narrower Sierraplex triplex, Leviton Centura, or similar devices. 

Cutout is made by hand and edges may have some irregularities as do the vintage plates themselves.

A couple of these have small corner chips -see last photo

Scuffs Oxidation and Wear. 

GFCI and Sierra boxes shown in photos NOT included.  Sale is for wall plate and screws ONLY.

See my listings for other vintage plates.