pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations Popular
By Paul F 543 downloads
ATT_Spec_4159_Jan22_Maint_AE_Dials_at_Substations_tci.pdf
16 pages. January 1922. Cleaned up scan of this classic specification, including parts inspection and dial speed adjustment. Contributed by Jeff Lamb. Bookmarked by Paul Fassbender.
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