Original vintage optical industry trade magazine ad for L.E. KNOTT APPARATUS COMPANY of Cambridge, MA. High Frequency Inductive Apparatus No. 95-335 Designed for a Study of the High Frequency Field, Including Wireless Telegraph Waves and Kindred Subjects. Old 1922 medical laboratory industry equipment advertisement.
l e knott apparatus company 1922 high frequency inductive vintage ad
- Product Code: s241
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 9
- Availability: In Stock
- $20.00
$15.00
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