Well, responses seem to have tapered off to this. By the way, thanks for doing PMs in reply, I'm sure this made it more interesting for others who could still make guesses.
Jack was first to reply and got every one absolutely spot on! I'm not especially surprised with his interests in the older vehicles, but well done none the less!
PB and Dave (moderator) came close behind, again with 100% correct!
By now I was thinking I'd made it too easy so I was relieved then to find a few people, possibly with a little less experience, making their contributions. A popular one was that the last item - the disc shaped thing - was a gas regulator. which was a very intelligent guess I thought as it looks quite like the regulator on a barbeque gas cylinder doesn't it?
So thank you for the great response everyone, you've given me a great deal of enjoyment. I hope the new one i've just posted will entertain you as much or maybe more - can't wait to see what people make of it.
Just for clarification:
The first Item was indeed a cable operated switch for a starter motor. I remember seeing them on many vehicles - Morris Minors for instance - and were typified by having a knob on the dashboard you pulled out to activate. In fact this actual one was off an old, quite large, horticultural cultivator I was working on a few years ago.
The next three were, as nearly all of you knew, a Gunson Colourtune. I'm actually surprised that so many knew of this tool as it's not a lot of use on modern engines due to the fact you can't now easily adjust mixture (and, as the computer is doing it constanty there's no need to anyway). Personally I found it worked very well with fixed choke carbs Solex, Zenith, Dellorto, Weber etc. but needed a bit of "interpretation" to work well with variable choke devices, S.U. and Strombergs were mostly what I worked on. The reason being that once the needle/jet assemblies had a bit of wear in them they would tend to run a bit rich at tick over so if you leaned them off using the Colourtune, then they would be too lean at higher revs. What it was very good at though was balancing mixture on twin or tripple carb setups - I'm not talking about balancing the throttles here - These setups had small diameter balance tubes in the inlet manifold/s running between the carbs so there was always a bit of bleeding between them. If, for instance, you had something like an MG with it's twin SUs you could put a colourtune in nos 1 and 4 and then play with the mixture until both came out the same colour - having first balanced the throttle butterflys. Just in case someone has no idea what a colourtune is have a look here:
https://www.youtube.com/watch?v=bRfSj47QCio Of coures this is using a motor cycle engine but the theory is the same on any carbureted petrol engine.
The last one is indeed a fuel pressure regulator. Made by Malpassi, I was surprised to see it's still available to buy to this day:
http://www.officinamalpassi.it/en/ It advertised that it controlled any excess pressure being supplied by the lift pump - in those days it would be a relatively simple and unsophisticated mechanical lift pump - and also damped out the pulse effect a lot of these pumps were prone to. In theory it sounded a very good idea. In practice, at least on the vehicles I ran it on, it made no measurable difference that I noticed. If you are buying a good quality fuel filter for an older car today I like the idea of the one that includes the filter:
https://www.dellorto.co.uk/shop/car...malpassi-filter-king-pressure-regulator-67mm/
So, hope you had a good time with that? and I hope you all, and others, will feel inclined to have a go at the next (and maybe my last) one? Regards Jock
Ps. Someone's come up in my PM notifications already! Hmmm, wonder if it's Jack? any bets folks?
PPs. Oh! Surprise! it's PB! Thanks PB, I'm just going to make a cup of tea and then I'll answer back.