4. Different movements. The Olympus uses a B19 (ETA 2892) rather than the B13 (ETE7750) used by the Fighters. I assume this accounts for the difference in feel/noise.

The 13 only winds in one direction so the 'run on' that the OP describes is actually the rotor moving in the non winding (anti-clockwise) direction where there is less resistance - effectively it's 'free wheeling'.

The 19 winds in both directions so never has that free movement of the rotor.

I received the Olympus Navitimer I bought off Ebay but it’s turned out to be as painful as the purchase of my Fighters from George at Govberg was pleasant.
I think I made every mistake in the book in trying to get hold of one of the very few Olympus’s around.
It was described as As New and Immaculate, but it’s clear that it has had an interesting life since 2003 and has been bright (and perhaps aggressively) polished to remove scratches etc. The seller, Juan Carlos Gonzalez of Frisco Texas has proved to be immovable and totally unhelpful and any hope of reconciliation from that direction has ended.
Paypal and E-bay (who I had great faith in) both proved to be toothless when it came to goods not as described, as it comes down to interpretation.
To cut a long story short I’ve decided the line of least risk is to keep the watch, and the £2500 I paid can be written off against “school of life “ training. If I returned it for a refund as the seller offered I might end up without the watch and the money?

There are a few issues with the watch, which hopefully you can help me with?

1) Although it came “with all papers” the instruction book is for a Navitimer, thus I don’t know how to adjust the calendar functions. I’ve looked on the internet but I can’t find anything. Can someone give me some tips or can I download or buy a manual from somewhere? FOUND SOMETHING IN HELP FORUM ON A MONTBRILLANT OLYMPUS AND HAD A GO AT CALENDAR SETTINGS, LOOKS LIKE IT MIGHT BE OK??
2) The bezel is very tight and requires a fair amount of force to move it, very unlike the smooth operation of my fighters, is this indicative of something more serious?
3) The link pin on the pilots bracelet (the single pin with a screw at each end) has a sheared screw, are the pins available at my Breitling AD (or wherever)?
4) I’m not familiar with the auto-wind function of the Olympus movement but unlike my Fighters, when the watch is rotated or moved around (although the “weight” can be heard to move) there is no “run on” of the mechanism.

Sorry about the awful technical descriptions, but I’ve got a feeling that by the time this is sorted I’ll have learnt an awful lot about Breitling watches.
Feel free to put your views down as my initial disappointment could be clouding my judgment.
I think I’m beginning to develop a love of new Breitling watches, safely bought from AD’s.
Thanks in advance for any help or advice.