[Milsurplus] Mystery Navy? SSB receiver with AFC

[Nick England]

Today I got a batch of 1950's Navy radio schematics (originals and large
size blueprint copies) off eBay.
One of these large size ones says "Typical SSB Receiver" but is obviously
drawn after some real piece of equipment.
Dual conversion SSB receiver with motor drive AFC driven from suppressed
carrier.
But I'll be danged if it is one I recognize - anyone? anyone?

Here's the lineup:
10-30  MC input
variable atten network ("20 steps of 40dB attenuation")
RF amp
pentagrid mixer <-- HF OSC (6.9-26.9 mc)
lattice filter (3.1 mc)
MF amp
MF bal mixer (2 triodes) <-- 3mc xtal osc in oven
splits to two 100 kc channels

Channel 1 (100 kc)
var attenuator (SB level control)
LF amp
USB/LSB filter
LF amp
LF amp
LF bal mixer <-- 100 kc XTAL REF OSC or exalted carrier (see below)
audio out

Channel 2 (100 kc)
carrier amp
carrier amp
4 section carrier filter
carrier amp
exalted carrier amp - (also feeds LF balanced mixer - see above)
AFC motor drive quadrature balanced modulator circuit

XTAL REF OSC  feeds other quadrature of AFC motor drive balanced modulator
circuit

AFC motor shaft controls trimmer cap in HF OSC

There is a switch to drive the AFC motor from AC line to reset/center it.

There are dashed lines implying 3 physical sections?
1) RF, MF, LF, AF
2) HF OSC, MF Osc, AVC, Carrier amp
3) XTAL REF OSC  and AFC motor circuits (shaft link to section 2)

Does this ring any bells?
 Nick England K4NYW
www.navy-radio.com