Spread some pussian blue oil colour on a flat surface like plate glas and transfer it to the hight spots of the zinc block then scrap the blue marked areas. Repeat until the whole zinc plate picks up the colour evenly.
This video may give you an idea:
The watch was very likely made or better say finished by David Golay of Sentier; Switzerland.
David Golay (1862-1938) was born in Le Sentier. After his apprenticeship as watchmaker he worked as adjuster (regleur) for Jules Juergensen Le Locle, later on he founded his own business 'David...
Right with one clarification:
The flashing seconds of a 'seconde foudroyant' movement's sub dial with four or five divisions make a full turn in one second in four or five jumps.
There were two variants of two-train movements:
the flashing 1/4 second or 1/5 second movements('seconde foudroyante') and the jumping movements with 1/1 second moves of the centre seconds hand. The second ones ('seconde morte') were stopp/restart without reset. Advantage was that...
Two snippets from Germany:
...the family Mertel originated from Nürnberg. Johann Georg Mertel became citizen of Coburg and watchmaker in the early 1790's...
...feb 16th 1835 watchmaker Johann Georg Mertel age 69... (obituary)
---> the very likely Pouzait escapement was made close to 1800...
The case was also swiss made; it shows the gold content in swiss and german hallmarks.
The watch went through the hands of D. A. Danckwerth; wholesaler; Hannover; Germany (DAD trademark)
According to Mikrolisks database it is the trademark of Adolphe Woog: importer of watches and chronometers; 10 Bartlett Building, London and 12 Rue de Quartre September, Paris ; registered dec. 8 , 1878.
A nice family heirloom!
Swiss bar style watch; made in the early 1850's. The case is likely made of silver (the inner back lid gilded metal). MJ would be the case maker.
Cylinder escapement; mediocre quality;
aiguilles means hands (the place to set time),
Quatre trous en pierre (4 holes...
'Muret Geneve' was a trademark used by Alexander Baume; registered 1878
A good picture of the movement could help to get more information. On the right middle there seems to be a trademark too.
Very likely Schoechlin finished and/or modified common movements to his sense of perfection. He sure did more than just put his label on the movement.
The case has also the German 14k hallmarks and the kind of finish suggests that this watch was intented for the german market.
There is a...