Just what I needed was another Black 500 but when I saw the straight handset cord and the date I could not resist. Looks to be unmolested. We will see when it gets here by the end of the week. I will add to this thread.
https://www.ebay.com/itm/264801101308
Got the phone. Well packed. All matching dates inside. 3/51 case, dial & network. Handset & caps marked 51 also. Elements & cords have been replaced. Pictures at a later date, it is in the queue.
Very nice find, Harry. Is it the small font 'operator' type? Looks like it from here.
Interesting that you mention the cords are replacements as you still have the straight h/s cord.
A bargain....will look great when it's reached the front of your project queue.
Photos from auction and close up of dial.
Looking forward to seeing more. Nice find.