Commando in bits, what is it and how much?

The frame is early, one of the 'ones that broke' and has been seriously messed about - so scrap. The swinging arm is a Metmachex alloy affair that doesn't fit the Isolastics; would devalue a standard bike even if it could be made to fit. Engine looks shiny but it depends what's inside. Ditto gearbox. PR body kit looks too shiny to have been raced but perhaps it was repainted. Wheels are standard with 18" Akront flanged rims, so worth a couple of hundred if they're straight.

At this distance it's a basket case. It'll cost a lot to put together unless you have a spare frame & swinging arm to hand. You have no idea what's inside that engine. Fuel tank is GRP so no use on the road, fairing is non standard. And you don't know whether it's complete.

I'd break it for spares and flog any decent bits off individually. If the grieving widow wants it gone then list as 'spares or repairs' and see what you're bid.

I bought a similar set of parts recently for around £2000.
I will probably spend another £2 to £3k powder coating, chrome plating and some new bits and stainless fasteners. Only planning to make a weekend rider not a show bike. Assuming the engine is ok and you put this one together with similar spend it would, in my opinion, be worth around £5 to £6k in today's market.
Could be a fun project and it's always nice to save another one!

2K tops, maybe a bit more with a V5. It might achieve more broken up for spares. 

Just came across this eBay lot.
This could be the same bike, with frame modified to make the wheelbase 4 inches longer.
Dont know if this link will work. If not search 'Norton Norvil Commando Motorcycle Article' in eBay.

https://www.ebay.co.uk/itm/364897839656?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=fHOmddpURTu&sssrc=4429486&ssuid=xI3IlR5PS4y&var=&widget_ver=artemis&media=COPY

It is such an unknown, in its present state and market I would estimate £1500 to £2000   I would think any restoration cost would far out pace its then resale value so not viable. As suggested, part it out or sell it as a project as is. That's coming from me and I'm a sucker for these things!!

.... is rigidly mounted to modified frame, so Isos will have a hard life , especially rear ones. I suspect selling it in bits will be only realistic option.