2 Humbuckers out of an early US Masters EP42 bass.
Size 3 1/2" L , 1 1/2" W, 1/2" D
The cases have many age related cracks, as do all the ones like this I've seen, but the hold together ok.
They are low-profile, with alnico magnets, wax potted. 2 conductors plus ground wire.
Both measure 5 k ohm, so not hot output, but might make for a good balance as a woofer in the neck position.
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edit 17/11/16 sold to tommorichards of this parish