HP fanciness, aka HP 16058a

It was a nice day today so I took a trip over to my old house to check on things, also took some junk and picked up some junk.  One thing I brought back was this test fixture:

It is one of the items I purchased from GTE:

https://wb9kzy.blogspot.com/2024/10/the-haul.html

It cost $1, I have liberated some stuff, the narrow test socket and Microswitches from inside that were used as an interlock.

  Why does it have a hinged lid ?  I'll have to consult the manual:

https://pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/20_HP_Agilent/HP_4145A-B_Semi_Analyzer/HP_16058A_Op-Serv.pdf

(the manual doesn't say, it also doesn't say why the lid is covered inside with a soft foam)

The two little jumpers are "the cutest" things probably ever sold by HP.  They have little 2 mm banana plugs on one side and pins on the other side, gold plated (of course).

I wish I had more of these

 

A really beautiful item, I doubt it was ever used.  Not sure what I'll do with it, I hate to strip off more parts but ?  There are quite a number of HP 16058a test fixtures on ebay, prices are well above $1 but still probably well below the original price  :)

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm