Its About Time has dated this piece to the 1870s.
This clock was owned by Rowland Hill the Inventor and Social reformer. Probably best known for creating the 'Penny Black' stamp and what was the Penny postage system.
This clock was sold by Grohe of Wigmore Street London and likely around 1875. The clock is quarter striking and has Alarm and date functions.

The base has a Strike / Silent lever and Rowland Hill engraved across the center. As a carriage clock is it high quality with a superb gilded case and bevelled 'white' glass, repeat function and calendar but with the historic connection to an important British figure (if not global) it makes this quite unique.
Its About Time has dated this piece to the 1870s.
Antique clock and watch shop specialist (featured on salvage hunters the restorers) with select fine furniture.
You can view the stock and full dealer information on the Its About Time Profile Page