[Milsurplus] Anyone ID this antenna Coupling Unit please

[Dave]

Hello all,

Wondering if someone can identify the unit in the below 
photos, please.

It's rack mounted, RF ammeters are scaled to 3A - missing 
it's ID tag and knobs. Tuning condenser is made by Hammarlund.

http://members.optusnet.com.au/davprin1/images/IMG_4312.JPG

http://members.optusnet.com.au/davprin1/images/IMG_4313.JPG

Thanks for looking,

Dave
VK4KDP