Identifying A HUGE Hydrogen Thyratron (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 15 Oct 2007 09:18:18 -0500
From: Cameron B. Prince <cplists@xxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Identifying A HUGE Hydrogen Thyratron

Hey guys,

Can any of you help me identify this MASSIVE tube I picked up at an estate
sale? The only markings are 4.8V Reservoir Voltage printed along the side.

http://www.rideware.com/images/eBay/20071011/DSC01254.jpg
http://www.rideware.com/images/eBay/20071011/DSC01255.jpg
http://www.rideware.com/images/eBay/20071011/DSC01256.jpg
http://www.rideware.com/images/eBay/20071011/DSC01257.jpg

I believe it's the same as the one shown on the Wikipedia page here:

http://en.wikipedia.org/wiki/Thyratron

All I can make out from the photo is General Electric. Any ideas?

Thanks,
Cameron