[Hammarlund] HQ-180 - Early Model?

[thoyer]

Working on an HQ-180 (spelled out).
 
Noted a couple things between the manual and pictures found on the web of
other HQ-180's.
 
On the speaker output terminal strip, Mine is labeled as GND, AVC and SPKR,
not GND, 3.2 and 500 as shown in the manual I have.
 
Also where other HQ-180's have a vernier tuning adjustment, mine is the bfo
adjustment and the slot depth is on the front panel.
 
Thoughts?
 
Tom
W3TA