M-1778 Bell Labs developmental transistor -just the transistor in photo w/part#

Description

error in photo
1778 Triode in Tetrode case. The boys,at the labs did odd things for development. Rare m number here  ref  this   as  a photo  for now one a one or  two  to offer.
N
eed  to update with something real !f  you  have  interest in this please message  me  and  will  send  you  notice  of  photo  etc
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M-1778  Bell Labs developmental transistor -just the transistor in photo w/part#
Do you collect transistor items especially  those related to bell labs? Lets talk!
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Untested and sold as is many semiconductors
from this era ate no longer functional
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Offers considered for highest and best use.
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