C32.535 Supplementary Addendum, Issue A, 10/15/53, TPT&T, 6 pages.
C32.535 Addendum, Issue D, 8/15/54, TPT&T, 2 pages, Noisy Locations
C32.535, Issue 4, May 54, 6 pages, Description and Use
C32.537 Addendum, Issue 1, Jun 54, 1 page, Installation
C32.537 Addendum, Issue A, 11/15/53, TPT&T, 1 page, Installation
C32.537, Issue 3, Apr 54, 11 pages, Installation
C32.538, Issue 3, Oct 53, 37 pages (missing page 2), Cording
C32.539, Issue 2, Jun 54, 18 pages, Maintenance
Contributed to the TCI Library. OCR, bookmarks and processing by Paul Fassbender.

Issue 4, May54 1954 - Telephone Sets 500 and 501 Type Description and Use
Addendum Issue A, Oct53 October 1953, 10/15/53
Addendum Issue D, Aug54 August 1954, 8/15/54, Noisy Locations

Includes TPTT Add iD Aug54 - Noisy Locations, and TPTT Supplementary Addendum iD Aug54 - 500E, 500F, 500L, 500M, 502A, 502B, 511A and 511B sets. Contributed to the TCI Library. OCR and Processing: Paul Fassbender.

C32.537 Issue 3, Apr54? April 1954? - 500 and 501 type sets, Installation
C32.537?Addendum Issue 1, Jun54? June 1953
C32.537 Addendum Issue A, Nov53? November 1953

C32.538, Issue 3, Oct 53 - Extract including pages 1 and 3 (Table A) highlighting conversions from 500 J and K to 500 C and D.

Issue 3, Oct53? October 1953
500 A, B, C, D, E, H, J, K, L and M.?? 501 A, B, C, D, F,?J, K.
502 A and B.?? 510 A, B, E and F.?? 511 A and B.

Issue 2, Jun54? June 1954
500 A. B. C. D, E, F, H, J, K, L and M.
501 A. B. C. D,?F,?J?and?K.

Issue 1, June 1953.  Also Issue 2, July 1954 with 502.  Also C32.542 i1 Oct53 and C32.549 i1 May 54.

Contributed by Steve Hilsz and Steve Cichorsky.  OCR by Clint Gilliland..