Struggle to return my 5140G

[danzzz]

Here's the dilemma that I need your input for...I recently added a 5140G to my collection - purchased from a well-known local watch shop for $45k.

The watch is beautiful in pretty good condition (looks mint). It was originally purchased in mid 2014 (on papers) and serviced about 3 years ago (some mild polishing done at PP). However, a couple of things are missing: the booklet (which I can care less) and spare solid case back which could be worth $5k+ to resell value.

What I'm struggling is that the missing back case could meaningfully discount the resell value in the future (assuming minimal appreciation over time).

I do have the option to return in the next 10 days - would love you hear your thoughts.

Best,
Daniel