This is a bass, treble, selector switch for an NAD 1240 Pre-amp. It should work with most NAD products from about 1985 until the mid 90s.

Appears to be the same on:
1130, 1155, 3130, 3125, 3130, 3155, 7130, 7140. 7155, 1240, 3020E, 3220PE, 3225PE, 3240PE, 7020E