thank you all so
very much for your fantastic help on this - I
really appreciate it

So, my thoughts are these:
- I cannot deny that we need to pay some bills and so would love it to be a Dresser piece
hence my keen interest in id'ing ( will have to sell another piece of glass instead

) however,
- even if I hadn't had that small hope that it might be, I would still love to find out something about it as a) it is absolutely outside my realm of collecting and something I would never, ever, usually even look at never mind buy and b) when I bought it, it was one of those instances where my hand just went out automatically and picked it up so it clearly had 'wow' factor somehow.
So, if I forget the bills that need paying and just concentrate instead on having some fun, this is what I've come up with:
Against
1) I agree that there are many makers who have made similar pieces with the rail and ball, the bun feet etc
2) There are some nice touches to this piece that presumably reflect the fact it was made by a good designer somewhere along the line but also could just reflect a good maker
3) I can see that there are marked similarities with the butter dish metal base that apparently has an RD no 789791 - which according to that seller is for year 1934 - it does look to be the same design as my base. And from the metal base on that dish it seems my lid is the correct match as the handles on my lid seem to match the handles on that butter dish base.
4) The glass jar on mine seems to work very well with the shape of the metal base (the glass pot has the corners cut off and left plain which seems to work in my holder) and the date Bernard has given for it being Walsh Kenilworth , the design of which dates to 1925 and that was still being produced in 1934, would support that date of the registered design 1934 above
5) I have found another Hukin and Heath piece (cruet with cut glass bottles in wood base with silver banding, bun feet and handle, marked H&H) with a similar handle to my lid and the bun feet, and is not attributed to Dresser. the lids on the glass pieces in this date to 1872. Of course they may be a marriage with the box base.
http://www.kaminskiauctions.com/dec29p2.htmscroll down a few and the picture is there
6) my base piece is not marked with the Dresser mark or a registered design no, and the lid and spoon are not marked at all
For:
1) The serial/design number on my base is 1177. As far as I can see this would be an early serial number, if it were related to Dresser serial/design numbers for Hukin and Heath. The design numbers for the Dresser designs for Hukin and heath that I have found, go back to 1000 numbers, one of which is number 1867 on a condiment set registered design for year 1878.
Christopher Dresser's assocation with Hukin and Heath started in 1877 if what I have read is correct? Therefore this could be an early design by him dating to around 1877/1878. I cannot fathom why a piece produced by Hukin and Heath in 1934 would have a number of 1177 on the back when they had been in business , what, c.80yrs then? So it doesn't fit in with it being one of their own design/serial numbers either unless it makes it a really early piece in their own inventory, which I think is unlikely?
2) my piece does not have a registered design number on it at all. Merely the H&H plate stamp plus the serial/design number. Could it be an earlier piece before his designs were registered ? Why does it not have a rd design number on it?
3) From the silver hall marks I found, if I read it correctly it appears to me H&H used this mark 1881-1882 and 1823 - 37 with the H&H appearing separately in ovals (I got the dates wrong in my previous posts)- would this translate to the silver plate mark of the H & H all being separately within ovals?. If so it would support against it being 1877/8 then I guess (amended post) but I'm not sure the marks will translate to silver plate being marked in the same way.
4) The base box in the linked piece could be a marriage and made later than the jars- but I have doubts it would be a 1930's marriage with jars that date to 1872. So could the jars and lids be a marriage? If they are originally with each other, then this box could be an 1870's piece which would support my preserve pot being an earlier design (though not necessarily a Dresser design granted)
5) If I have read JP's reply correctly (and apologies if I have misunderstood), this could be a replacement glass piece in my set. An old repair, but perhaps on a reaplacement piece anyway?
Any further comments very much welcomed - do my arguments make sense? :wsh:

thanks again
m