Issue 2, Sep58  September 1958  - Type 80 set with line key.

AUTOMATIC ELECTRIC
Technical Bulletin 701-88T
Issue 2, July 1959

LOUD-SPEAKING TELEPHONE SET
TYPE 88T (TRANSISTORIZED)

AUTOMATIC ELECTRIC
Technical Bulletin 701-89T
GENERAL TELEPHONE & ELECTRONICS
Issue 1, September 1959

LOUD-SPEAKING TELEPHONE CONVERSION SET TYPE 88AT (TRANSISTORIZED)
File sent:
AECo Bulletin 701-89T Type 88...
 
1. APPLICATION
This conversion set gives loud-speaking service to a subscriber who has
an Automatic Electric Company Standard Type 80 Telephone, Key Feature
Telephone Type 85A, 85B, or 85C, Key-Telephone System Type 86 ? 10A or
10A1, or a Western Electric Company Telephone set of the "400" series or
"500" series used in a Western Electric Company No. 1A or No. 1A1
Key-Telephone System.

2. DESCRIPTION
The conversion set  comprises a loudspeaker, 3-conductor cord,
6-conductor cord, and an adapter-unit (consisting of a turn key,
microphone, flashing indicator lamp, and a volume control.)
The purpose of the flashing lamp is to indicate to the subscriber that
he has seized the line.

Issue 3, Sep58 September 1958
Types 62, 62-55, 82, 82-55, 92 and 92-55.

Technical Bulletin 702-86
Issue 1, November, 1957
Northlake, Illinois, U.S.A.

SEMI - POSTPAY PAYSTATIONS
TYPE 86, 86-10, 86-55, 96 AND 66

Issue 1, Aug56  August 1956  - "Butt set"