National Watch

This location on South 18th Street is listed as National Watch, though the business's own current materials describe a rebrand: for more than 35 years the shop operated on Philadelphia's Jewelers' Row as National Watch and Diamond, and around the COVID-19 period it relocated to Rittenhouse Square and re-launched under the name Rittenhouse Estate Buyers, or REB. Under its current identity, the business describes itself as a buyer and seller of pre-owned luxury goods rather than a repair shop — watches, jewelry, gold, coins, and collectibles bought directly from the public and resold to collectors and enthusiasts. Its own materials mention watches from brands including Rolex, Cartier, and Omega, fine jewelry from names like Cartier and Tiffany & Co., pre-owned handbags from Louis Vuitton and Chanel, gold and silver bullion, and sports cards and coins. The shop describes its core focus as buying: continually acquiring pieces from sellers looking to part with jewelry, watches, or other valuables, which in turn keeps its resale inventory in constant rotation. This buy-first model is common among estate-buying businesses, which position themselves as an alternative to auction houses or pawn shops for people looking to sell high-end items directly and quickly. Having spent over three decades building a reputation on Jewelers' Row before relocating, the business brings that same longevity to its new Rittenhouse Square location and identity. For anyone in Center City looking to sell a watch, ring, or piece of gold jewelry — or to browse a rotating selection of pre-owned luxury pieces — this is a business built primarily around that buying-and-selling relationship rather than watch repair services.