Here is an example of an extant verge:
© Trustees of the British Museum
Number
|
Date
|
Description
|
Notes
|
Unknown
|
c1778
|
Astronomical,
gold-consular cased verge. Diameter –
55.2mm.
|
The
dial shows the positions of the sun and the moon in the zodiac throughout the
year, the stars visible each night, the age of the moon and the times of high
tide at various ports around Great Britain. The whole dial rotates clockwise
once per day, together with the solar and lunar indicators, but over the
course of a year both solar and lunar hands regress at different rates to
show the position of the sun and moon in the zodiac. Effectively, the dial
rotates once in a sidereal day - 23 hours, 56 minutes, 4 seconds - and the
solar and lunar hands rotate once in a solar and lunar day. In the collection of The British Museum
|
The article includes a table with details/illustrations of 27 extant horological pieces attributed to Margetts.
Margetts’s story involves innovation contrasting with the
more mundane. His ultimate potential
seems to have been unfulfilled and I wonder if his lack of success stemmed from
technical shortcomings, lack of commercial focus or a paucity of ability to
present himself and his ideas effectively - for example in his dealings with the Board of Longitude.
But, whatever might have been
possible, there can be no denying that his Astronomical Watches were very
expertly designed, are nicely evocative of his period and remain aesthetically
triumphant.