[Pictorial Broadsheet] Electrometer Triode
Delft, Holland: P.J. Kipp & Zonen, ca. 1934. First Edition. Pictorial broadside (28x22cm.); previous folds, chipping and minor toning along extremities, faint contemporary (1934) library rubberstamps to recto, else About Very Good. Issued by the still-extant Dutch machine manufacturers. More