Prestons has acquired Winsor Bishop in Norwich according to documents released on Companies House today.
The business is known to have been put up for sale by owner Sophie Fuller and there are thought to have been a number of bidders in a sealed offer process.
Prestons holding company Davane Holder is now listed as the only person of significant control, defined as owning 75% or more of Winsor Bishop.
Prestons managing director Karl Massey is named as a director starting from Tuesday, July 27, when the deal concluded.
Mr Massey said he would not yet comment on the deal when WATCHPRO called him this morning.
Winsor Bishop is a natural fit for Prestons thanks to its authorised dealer status for Patek Philippe, Rolex and Tudor, the only three brands that Prestons works with outside of its pre-owned luxury watch business.
The Norwich jeweller also currently represents Omega and Breitling.
Prestons will now have five showrooms across the UK: Winsor Bishop in Norwich; a Rolex boutique and a Prestons pre-owned store in Leeds; a flagship in Wilmslow, Cheshire, anchored by Rolex and Patek Philippe; and in Guildford, an existing Rolex and Tudor store is changing to a larger unit that opens at the end of August.