Hi,
This may be of some help to you
A Mary Mathews married a Samuel Quarman 1771 in Midsomer Norton ( which is just five miles away )
Info is from Boyd's marriage index (which I have saved for all the listed Quarman's- as I've been researching my own Quarman lines for years)
I know that Samuel is the most well known of the clockmaking "brothers".
There are a few Mary Quarman's in the area and surrounds through out the 18th and 19th centuries , so it's hard to tell what era your clock comes from.
whether the above is Samuel Quarman "clockmaker" marriage I don't know , you'll have to follow it up - marriages usually took place in the bride's parish. Mary could also be a daughter.
Have you thought about having the clock dated by someone who knows about clocks- an antique clock dealer or the like ? They usually can tell by the movements when it may have been made - thus narrowing it to a decade. It sounds unusual that it has a woman's name on it. Maybe it was for a wedding present, or birth (??).
Can I ask how you acquired it? Was it passed down or bought ?- for example if it was passed down to you it may be easier to trace it's origins
Kind regards
