Vintage 4001 Bridge pkup "Aluminum Bass" yrs ?

[bigbob]

I have a complete older Ricky Bass Pickup Assembly with an aluminum base that the pickup rests on, unlike the black plastic ones that are more common. Tests 7.8 anyone know approx. date of this Issue. Thanks. More desireable than plastic ? Value ? no longer needed!
see pics. Trade for 4001 Blk truss rod cover/?

[wints]

If it has a black bobbin BigBob, (You can tell I've had coffee this morning ,) it's probably from the early-mid 70's. If it has a light green bobbin, the late 60's. The green version would be more valuable, but this should be quite coveted as well, running comfortably over $100, possibly nearer $200.

[jingle_jangle]

Ricky? Ricky? RICKY???

Slowwwwly I turned, step by step, inch by inch...

[chefothefuture]

THe way that the base plate is cut to accommodate the hight screws is another indicator
of date.
The late 50s and 60s ones have a distinct notch. The early 70s ones are just cut on an angle(like the one you
have pictured).

[weemac]

Big or small magnet is yet another indicator. This one is an early 70s (pre 74) one.
emac.

[rickaddict]

A photo of the front would help to narrow down the vintage.

[teeder]

It has dome top poles.