Oh Ben. I try so hard to educate people ;)
Great Walk around video <3
Sweden bought 26. 2 Prototypes, 6 Mark 1 and 18 Mark 2. Known as Amfibiebil 101 A, B and C.
Solid tailgate - was requested by Sweden, supplied from factory with a short ladder, to help people climb in the back when in water.
Tyres - Track grip was Alvis' standard tyre for all FV600 range. British Army changed from Track grip to Bar grip around 1965 because the rocky tracks in Aden destroyed the stiff sided Track grip tyres.
Top marker lights - PV4 and 5 had full navigation lights fitted by Alvis. Mk1 and Mk2 had 2nd set of Lucas side lights fitted at top so that they could be seen in the water.
Hatch rest - This is the "Air deflector board", that was installed to prevent wind blowing into the open cab hatch. It was designed before the foreword opening hatches were designed. It just happened to be convenient for the hatches to rest on it.
If you look at the Hour gauge and the millage, it is low use, not just low millage. Kustartilleri (KA) were not full time units, and some Stalwarts were used every 5 years. 5 KA units, taking it in turn to exercise, one KA a year. Not every Stalwart left the shed.
Swedish dash - has additional gauges. Lighting switch attached to right side is equivalent to British Convoy light, which turns off brake lights, etc.
You didn't mention model is FV 622 S. S for Swedish version.
Second photo shows Flytsläpvagn 803 - Kustartilleri Floating trailer, carrying a Bofors 7.5cm 1965 gun.
Swimboard - Water deflector board should have two locking pins chained to the frame, to lock it in open and closed position.
Markerboards - Left one, not sure - 2nd left, unit badge - right one and rear one - square white reflector, to stop other vehicles driving in to them in the dark.
FOCO cranes fitted by Kustartilleri around 1974.
Fuel tank drain plug behind cover plate on Hull plate.
Single tailpipe from Silencer is probably original Silencer from 1967. British changed to twin Spark arrestors early 70s.
One cage in Louvers area is for Snow chains. They also carried 3 man dingy in CES.
Hope that helps.
Looking forward to the next video :)

These got fully decommissioned from Swedish military service in 1985, as you said used in the Swedish Coastal Artillery/ Marines. There is still one at the museum for mobile coastal artillery in Karlskrona, they have a Mk2 or "Amfibiebil 101 C" as they were called in the Swedish military.
I served in the Coastal Artillery from 1981-1987 1993-1995 but left for the Army in 1995.

Edit: I'm fairly sure this one came from the Coastal Artillery Regiment KA2 in Karlskrona South East Sweden.

I adore Stalwarts, hopefully the next test run will be a bit drier. 😀 The switch box shown at 4:23 is a tactical lighting control box. Position 1 dimmed lighting, Position II Blackout and position III small lamps below windscreen.

I used to drive them in the 70s, a great peace of kit , got them stuck a few times exiting a river in Germany, happy days..

It's amazing to see the Stolly has kept its Alvis emblem! These are highly popular collectible items. I managed to obtain a couple of WW2 era Pratt & Whitney emblems for my collection, by... Um.. "Rescuing" them when the chance arose. So I know how tempting to grab they are.

I've loved these since I first saw one as a sprog! And then came UFO and SHADO - those that know, know!

Gorgeous. My favourite military vehicle. ❤

Wonderful!!  What an absolute survivor.  Amazing that it's so original and unmolested. Great to see!

Just what a good man needs, is another military 'toy, I look forward to your restoration progress, so get working on it😂,cheers mate, best regards from Melbourne Australia, Les

Always wanted a STALWART from the first time I saw 2 of them parked outside a chippy in Pickering North Yorkshire. This was circa 1978, the drivers were having a quick spot of lunch I guess they were driving  between their Army camps.

Well done!
The switch panel at 4:25 is for the blackout lighting which all Swedish military vehicles have. Usually there are removable semi-blackout lights which are mounted to brackets on the front. They give off just a tiny amount of light directed downwards so that you can (barely) see the road right in front of the vehicle. The switch appears to have 3 positions; 1 is "normal" lighting, 2 is blackout (all light off) and 3 activates the special semi blackout lights.

Yeah you have bought a good
One there Benn,mind you i didn't know that Sweden had any mate..

engine sounds awesome

That’s the best looking stolly I’ve seen,most envious😂

Fantastic. Great channel and lovely vehicle. Been messing with a 49cc carb this weekend. Hugely less consumption but equally tricky.

I have a list of favourite military hardware. De Havilland Mosquito is number 1, Alvis Stalwart is number 2, Scorpion tank is number 3. Subscribed.

Great vehicle , thanks for sharing 👍 💨💨

loved it, waiting a while, but yet again another great video Thanks B

Wow nice ladder rack! 🎉🎉

That’s so awesome Ben, it’s so great to see one so original and in such good shape. It will make a nice change to not get the welder out. Maybe when you slam her in water close the hatches though 😂 last time was hilarious though, YouTube gold x