Advice on Omega Seamaster 600 Ploprof

Hi everyone,

I am in negotiations with two sellers to purchase an Omega Seamaster 600 "Ploprof", both in conditions that looks good to me and at a price that seems interesting.

I am neither a collector nor an expert, but a lover of the model, and one who would like to come into possession of a specimen in good condition, to be used with moderate regularity (and therefore not a fragile one to be kept under a display case).

The watches in question are these:

https://ibb.co/KFwhhLz

The first has a service dial (I think a D6 or D7, to be clear: the one with the 3 o'clock lume touching the date window). It comes also with an isofrane strap, and a one year warranty from the seller.

https://ibb.co/pj07jJG

In the second, the dial would appear to be coeval, as also evidenced by the patina. The cost is about a thousand euros higher than the other.

Neither has, alas, original papers or an Omega extract (and from what I understand Omega has discontinued issuing extracts), but I know these are also a rarity.

Given the premise I was making (i.e., wanting a watch I can use), in your opinion, how much does it really matter to try to get possession of a watch with coeval parts? Is there a real risk of one day having to take it in for restoration (and having Omega replace the dial with a service one)?

I thank you in any case for your valuable help!
Have a good day,

People like pictures not links, yes I have too little to do at work today.
First one:


Second one:

THe first one have also the service red pusher button, the second seems completely original parts.
If you don`t care about the authenicity and want a daily, would pick some Omega serviced with luminova bezel, hands, dial... I wore original ploprof and the bezel gone dark very soon in the solty water...