Vtg IBM TR-3 Vacuum Tube Module Computer Plug In Pluggable Unit 604 Series? Part For Sale

Vtg IBM TR-3 Vacuum Tube Module Computer Plug In Pluggable Unit 604 Series? Part
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Vtg IBM TR-3 Vacuum Tube Module Computer Plug In Pluggable Unit 604 Series? Part:
$89.95

Vtg IBM TR-3 Vacuum Tube Computer Plug In Pluggable Unit 604 Series
This listing is for one TR-3 Vacuum tube assembly as shown in the pictures.
If you are looking at this listing you probably know more about these than I do. This is part of an estate sale fined from a gentleman who had retired as a chemist from a local plant in my area. Thanks to Google lens I have been able to do a layman's search and understand a little about what these are. I am not sure if these have been used or not or if they are working or not working.
Please see all pictures for measurements to help determine condition and application. The pictures are considered a very important part of the description. Be sure to use the enlargement feature for extra detail.
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