The DuMont 3WP series of flat-faced 3" mono-accelerator CRTs, introduced in 1952, were among the most widely used CRTs of the 1950s.
The 3WP1 had P1 phosphor, the 3WP2 used P2, and the 3WP11 had P11.
Tek part numbers:
- 154-0059-00 = 3WP2
- 3WP Series CRT Datasheet (PDF)
- Peter Keller, The Cathode-Ray Tube: Technology, History, and Applications, p.103. Palisades Press, 1991. ISBN 0963155903, 9780963155900 → online copy
- 3WP1 / 3WP2 @ radiomuseum.org