MicroWare by Anchor Hocking, Made in the USA, made from Microwave safe melamine.

Speckled colors through-out microwave dish. 

Looks to be brand new unused, but was purchased as used.

Vintage Anchor Hocking MicroWare Microwave all purpose rack for bacon and meats.
The CHILL-THERM items in this set can be used in all microwave ovens and conventional ovens up to 400 degrees F.
Ideal for compact and full-sized microwave ovens
Dishwasher Safe
All-purpose Rack 11-5/8" x 10-1/2"

See photos for all the details.