Sanyo Electric Co., Ltd.
It is sealed and here are the measurements to insure it fits.
I believe this is from the 1990's.
measurements: 2 15/16" -width including black mount areas on each side.
2 7/8" - gold foil only width.
1 7/16" - height black to black mount areas.
If you need addition information let me know.
ships fast upon payment!