Black P90 style single coil pickup with "soapbar" cover. Alnico 5 magnets.  Bridge Pickup.

Measures:

7.4kOhms

3-3/8" (3.370" or 85.6mm) Wide

1-23/64" (1.368" or 34.7mm Long

25/32"" (0.788" or 20mm) Mount to Mount

Overall String Spacing (center of 1 to center of 6) = 1-31/32" (1.968" or 50mm).