This driver was pulled from a set of 19's that I bought a while back. The 19's had this driver & a 902 in them & I replaced this driver with another 902 to make a matched pair.
I'd now like to try some different mid drivers in a pair of La Scalas & if I can make a matched pair with this one, I'll only have to buy 1 driver.

There are no Altec markings on this as you can see from the attached, maybe replaced at some stage?

I took the diaphragm out & it has the tangerine radial phase plug fitted.

Any ideas?