rich wrote:
Even Solitron never heard of 'em:-)
http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=012

These are Bell System or Western Electric parts. Pretty much any tool or
part made for the Bell System had a KS number. Here's a web site that
explains it:
http://www.ablepanasonic.com/telter.html

"Bell's actual hardware items (jacks, adapters, transformers, etc.)
often carried a KS designation. KS stood for Kearney System, a parts
numbering scheme developed for a Western Electric factory in Kearney,
NJ. Even today, some common pieces of telecom hardware are marked with
KS numbers. You might also find pieces of telecom gear with a ComCode,
another Bell/Western Electric part number scheme. One 50-cent part can
have a dozen different identifiers."