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K&E 4097 & 4098 Family of Slide Rules
4097 --- 5" Version of the 4094 and 4096 Merchants Slide Rules. First shown in the 1931 catalog.
Scale set: CF = CF CI C = D
- 4097 --- 5" "EverThere" Slide Rule. Serial #29493
4097B --- Replaces the 4097 in 1936. The same as the 4097 except for the cursor.
4097C --- Replaces the 4098 in 1936. The same as the 4098 except for the cursor. This is a 5" version of the 4053.
4097D --- First shown in the 1936 catalog. The scale set is a combination of the 4097B and 4097C. It is the predecessor of the 9061 and 4161-1.
4098 --- This is a 5" version of the 4053. First shown in the 1931 catalog.
Scale set: A = B CI C = D K
------------ = S L T =- 4098 --- 5" "EverThere" Slide Rule. Solid celuloid cursor. No logo. Serial #21421
4098A --- This is a 5" version of the 4041. First shown in the 1936 catalog.
Scale set: A = B C = D
------------ = S L T =- 4098A --- 5" "Pocket" Slide Rule. Solid celuloid cursor. No logo. Serial #24212
- 4098A --- 5" "Pocket" Slide Rule. Solid celuloid cursor. Modern K&E logo. Serial #106102