Red sub 1680 needs input

[army scope jockey]

Need some seasoned eyes to give me the low down on this 1680 red sub circa 1970 with 243xxxxx serial number.

I suspect service insert. Dial and hands appear original and bracelet is US made C&I stamped 1970. Worth pulling the 21K trigger???

[Swearengen]

The discolouration of the lumes would bother me, and might just bother you in months to come. Its probably been damp at some point. There is a fair bit of pitting on the rear of the case and case back, again factor that in. Here's mine for comparison.

[rootbeer7]

The dial is unpleasant in my opinion

[TuRo]

Nothing wrong with most of it per se for me, but the marker dotting is a little mottled for some tastes, and doesn't match hands that I think are possibly later 80s, there's a tiny bit of paint missing on outer 30min marker, bezel look dubious too. Reverser wheels are service. I'd see it as a tops £14k or $18k watch perhaps, $16k to be safe!

[hutch300]

I rather have a 1680 or 5513 in better condition than this red sub.