Congratulations, that's a lovely watch (and excellent photos).
I'm on record here as saying I immediately appreciated the quality, design & care Monta put into their watches, and that I'd get one someday.
Well, I picked-up a second-hand 1st Gen Monta Oceanking about six months ago and I love it. I got it at 11-months old for an absolute bargain.
It is one of the first 100 they made, which came with a special package: limited-edition orange 'Everest' rubber strap (those sell for £160 on their own); complimentary 'movement tuning' (whatever that means) within two years & extended four year warranty.
I have no qualms whatsover in saying that it is - at least - the equal of my ETA Tudor Black Bay, and superior in several areas to my Rolex Submariner 114060 (though the Submariner is the superior watch overall).
At 40mm wide, 49mm lug-to-lug, 13.8mm thick, and with 20mm bracelet tapering to 16mm, it's pretty-much in my sweet-spot re size.
The bracelet is superb - polished chamfers run above (and below) each link, so that it's smooth on wrist; the links are fully-articulating (they can be folded right back & stacked vertically on top of each other) which equates to a supple & conforming fit on wrist; the end-links fit snugly to the case and are actually two-part (if you see what I mean), so instead of jutting out straight from the case, the first link drops nicely down around the side of the wrist (crucial for those of medium-small wrist size); and the screwed pins are a doddle to adjust. The clasp is good & beautifully made, but there's no doubt the no-tools micro-adjust on the 2nd Gen is an improvement there again.
Fine finishing on a tool/dive watch is not everyone's cup of tea, but the beauty is something that really elevates the watch, and adds visiual appeal from every angle. The polishing is really excellent, with chamfers on the case, lugs (both inner & outer - quite like Grand Seiko do), bracelet (both sides) & clasp - there’s not an ugly sharp edge anywhere to be found, it feels lovely in hand, a thing of real quality. The 1st Gen lacks crown guards, something they reinstated on the 2nd Gen, but I like the vintage, unusual look of the onion crown (beautifully crafted, like the rest) on it's own, and it also slims the watch size down to the eye. The crown is also recessed slightly into a hollow on the side of the case - a nice little effort to offer some protection in the absence of guards.
The diamond-cut hands & indices are almost as good as my Grand Seiko (but not quite) - super sharp, and faceted to both better reflect light (massively aiding legibility) & also add aesthetic appeal. Finally, they're plated with Rhodium (a more expensive cousin of Platinum) so they have a beautiful lustre quite apart from stainless steel. Monta have also produced an unusual 'waterfall' effect with their indices - the lume looks almost to flow over the edge of the indice and down to reach the dial. Their markers caused a lot of hassle for their manufacturer. The hand supplier is Swiss, by the way, as are all of the suppliers to the watch - this is not a cheaply-made piece. Also fun is the way the rehaut has cut-outs for around the markers - again, a small detail which adds cost & complexity, but also interest.
The 60-click bezel is subject to several patents - it is engineered so that the dial markers always align with the bezel markings, and the ceramic is held in by friction, not just glued. It has a very authoritative 'clicky' motion that exudes quality & solidity, with zero backplay. Pushed on it, I'd still say I personally prefer the bezel action of my Black Bay & Submariner, but those really are 'best in class'. The 2nd Gen adds a lume pip (a glaring omission on mine) as well as lumed markings, but this aspect doesn't bother me - I neither dive nor time things in the dark (ooh er...!).
The sapphire crystal has a pronounced double-dome, which adds height to what is quite a squat watch head, but as with my Speedmaster, I always feel that a crystal is a 'false' height, if that makes sense - yes, it's physically there alright, but it looks slimmer than it is, because the crystal is transparent. The way the angle of domed crystal meets the ceramic bezel and then seamlessly continues it's sloped fall over the angled bezel is a thing of subtle joy. It has 7 layers of AR coating on the interior. The 2nd Gen has a flat crystal which improves the dimensions, but at the loss of charm, for me.
The Eterna 3909A movement is a bit different to what you see every day, and with a terrific 65-hour power reserve. Monta aslo say they hand-regulate each to Chronometer spec (though it is not COSC qualified), and having thrown it on my Timegrapher machine, I can vouch that it is running in exemplary fashion. The 2nd Gen's Sellita movement will be cheaper & easier to service, and based on the 2892 (I think), it is of excellent quality.
I'm sorry to have hijacked your thread a bit (just started waffling and couldn't stop), but I thought you might appreciate the input of a fellow owner, and I deem it worthwhile adding to your excellent testament, because I think many see the price from a micro-brand and immediately consider it overpriced, which it is not (to my mind anyway).
I hope you continue to enjoy your watch and the glow of new ownership never fades.