[Boatanchors] F/S: Western Electric 216A "Tennis Ball" Tube:

[digital-conjurers at roadrunner.com]

Western Electric 216A Third Version "Tennis Ball" Amplifier Tube circa 1923:

Reference page: http://www.bill01a.com/articles/we-216-a.htm

Pics at: www.moonlightsys.com/216A/

Patents:

1-15-7 (two patents), 2-18-08, 10-17-16, 12-17-18, 6-24-19, 12-19-16 1-27-20

Filament continuous, pins straight, with intact wrapper saying "Licensed 
for use only as part of the Western Electric loud speaking telephone outfit".

Glass tight with base.  Been in collection for many decades. Asking $375. 
Buyer specifies carrier (USPS Priority Mail/UPS/FEDEX),  pays for 
insurance. Good packing assured!

Contact Lin/KJ6EF at KJ6EF at qsl.net

Thanks for looking!

73 DE Lin/KJ6EF