Sold For $148
*Includes Buyers Premium
Two signed FDCs, one bearing a cachet honoring 25 years of transistors, signed in pencil, “W. Shockley,” adding a sketch of a transistor circuit above his signature; and one bearing a cachet honoring progress in electronics, signed in ballpoint by John Bardeen and Walter Brattain. In fine condition. RRAuction COA.
