THIS IS A LIGHTWEIGHT DOMESTIC BAROMETER NOT A HEAVY MARINE item and is NOT suitable for boats and will not match any clock you already have.
NEW a 145 mm diameter x 45mm deep spun brass wall Barometer
It can be hung on the wall with integral hanger.
Note:
This is a lightweight domestic unit not a HEAVY MARINE Item and therefore not ideally suitable for boats.
http://stores.ebay.co.uk/Mega-Quartz-UK