Sorry for your loss I'm sure this is a trying time for you. My condolences to you and your family.
That's a super nice one you've got there! Would love to get some more info from you though such as, do you have guitar experience or do you just want to be able to sell it without much hassle? If you do have some experience you can find a set of No Line Kluson tuners (1955 and earlier) on Ebay occasionally, got a set for $130 last month, very clean! Replaced my shrunken plastic.
I paid $4100 for mine back in January, slightly too much I think. It's all original though, just the typical faint checking and scratches.
Value is a tough thing as you could probably find the tuners to replace the newer ones and an original bridge and knobs for fairly decent price. IF you wanted to put a little money into getting it original again. You'd still have the holes but only discerning collectors would pass on it. They ARE awesome guitars and should be played anyway as I do! Would doing those things drive up the value? Probably but not much, the body looks to be in awesome shape from the pic and one in similar condition except completely original sold for $6k. I'm just a player but I watch the market closely. I think as it sits, the numbers thrown around is pretty accurate for current market. $3k or so. With correct parts might be able to wrestle in upwards of $4k but $3500-3700 more likely.
It's a gamble though, for instance it may sit on Ebay for quite awhile if you left it alone. It would take someone like me or some of the other guys here who don't really care that it has those mods on it and just wants a good deal for a player. I've seen the same super clean ones over and over sit there for months now because they are probably priced too high and sellers won't back down to reasonable prices.
On the other hand if you put a little into it and put it up honestly but it has the correct parts it may go quickly at the right price. Majority of people though tend to want vintage items like this to have all the OEM parts so ultimately the decision is yours. You may try putting it up on Ebay for say $3500 BIN or best offer and see what offers come in to gauge interest.
We are here to help if you need it! Take care and write back with an update.