These are Texas Instruments
TCM2912CJPCM Line Filter
in a ceramic 18 pin DIP package [date code 9138]

These are factory new parts. They have never been installed and have not been recovered from manufactured electronic components.

Shipped Anywhere Within the USA for $3.25
Shipped Anywhere Outside the USA for $7.50
Combine Shipping with other Luddite Products

There were 29 pieces at the time of this listing. These are being sold individually.