Andrew’s achievement in continuing the business after Richard’s tragically early death in 1987 was heroic. Both were active in hiring instruments and influential in establishing the use of historical temperaments in tuning.
I recall obtaining from them a most marvellous analog device, way before mobile phones, a plastic dial device they called a Tuning Compass. It had a few of the more common temperaments and you could turn the dial and the tempering between the fifths on the circle of fifths would show in the circular windows. Very clever and imgenious and useful. I lost it years ago, but amusingly recently I found a paper photocopy I made of the Werckmeister temperament.
[I see thet @hpschdNU has mentioned this simultaneously with my post.]
If you cannot find J Pauls book on Momox or ebay or anywhere else I can send you a scan of the pages, personal use as subject to copyright, surely. I remember purchasing this in about 1990, remaindered out at a London bookstore. I do assume you have W Z’s book!
Wood for sale: perhaps Monsieur Michaud in the Jura might be interested too, here’s his site: