[Hammarlund] SP-600 trio

[Loren Burkett]

Need an SP-600 historian.
On eBay there is an SP-600 VLF 31

- This the first VLF version I have ever seen
- It has no JX version or SN!!
- Many different mechanical features
- It looks almost new!

The seller is out of Colorado.  radios-n-stuff <https://www.ebay.com/usr/radios-n-stuff> (16364) and Sam says "he got it from someone who restores R390's and SP- 600's

Can anyone explain this variant?

Loren
K3RFC