1950's IBM 403 Plugboard Accounting Machine w/ Plugs

Description

I acquired this years ago but don't know much about it. There are blogs online that give the history of this and the machines they worked with but I'm not sure if I'm allowed to link those here. If you google "
plugboard programming with an IBM 403 Accounting Machine" I'm sure you can find out all you need to know about this item. There are two plugs that have been damaged as can be seen in the 7th picture. I have not attempted to remove any of the plugs so I can't say if they remove easily or if they are too fragile to remove given its age. I tried to get a picture of every side so buyer has a good idea of its condition, but feel free to ask any other questions about this item you may have.
-From a fellow eBayer: There is an approximately 1/4 inch diameter hole there (bottom edge) that a matching pin on the receptacle enters, making it impossible for the IBM 405 identical size but incompatible control panel from being used in an IBM 402-403 by mistake. Few control panels have "keying holes" like this one!
6.8Lbs
*Only able to answer emails and ship order on Mondays and Fridays, 10-4pm, CST, Except Holidays.
Because of my schedule I may not get to best offer bids on time as they seem to last only a couple days before expiring. Not receiving a response from me does not necessarily mean I am rejecting it, just that I may not have seen it in time. Please keep that in mind when deciding what day you'll make an offer.
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All of my items are sold AS IS. Most of them are vintage, antique and/or handmade. I try to be upfront about the condition of every item but some things are just plain obvious from the pictures. If you have ANY questions about the condition of an item or are wondering whether it will work with what you want to use it for, PLEASE feel free to ask. I will gladly send additional pictures of anything you want to see closer up.
***I'm flexible when it comes to shipping so if you have a preference on how you want me to send an item (I only send through USPS) please let me know before you pay as it's easier to adjust the price to reflect shipping method before payment is made rather than after. Exceptions may be made for "Buy it now" items if I'm not available to respond to your requests in time. Thanks.