Prestons has acquired Winsor Bishop in Norwich according to documents released on the Companies House website.
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.
As well as offering a bespoke design service, Prestons deals in brands Mikimoto and Georg Jensen.
The Winsor Bishop shop in Norwich has been on the same site for nearly 190 years and deals in jewellery from Shaun Leane and Fope. It also already has the Mikimoto brand in common with Prestons.
Mr Massey said he would not yet comment on the deal when PJ’s sister title, WatchPro, asked for more details.
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.