I have been to the B'ham clock fair several times. Don't hold your breath, but you might be surprised.
My clock has the supports for the suspension guard, but is not currently fitted. I do have one, might fit it sometime.
We do not live far apart, only 25 miles, perhaps we ought to meet.
I am pretty confident the pendulum is not original. It is a Badische model. Wurth were supplied with a number of different pendulums. If you look in this link Post Your W. Würth & Co. Clocks Here for a post from Ingulphus in 2008 you will see the most likely match and others.
The website shows online bids prior to the auction, not live bids at the auction, which you can only see if you are registered for the auction. They take a while to catch up on the standard website. I bid up to £1350 and failed.
I referred this clock to JH before I bid on it. The case and garniture are not as pristine as the photos suggest. I did not win the clock. Here are his comments on the clock.
Grivolas produced clocks until near the end of 1914 and possibly into early 1915. The movements of their own design...
Pretty sure my clock is original. What part of the UK are you in? I have been relatively inactive on these clocks for a year or two due to family issues. Haven't worked out how to PM since the website upgrade, but if you can send me your contact details.
The clock has been partially dismantled for quite a while. I removed the escapement to run the movement to check on mainspring integrity. The pin on the arbor is canted slightly to the right viewed from the rear of the clock