Carl Bucherer 18ct Gold Cufflinks

I got this cufflinks from my late grandfather,I did research online and this is what i could find:

stamp: 750 CBmeasurements: 2.2 cm / 1.55 cmMaterial: 18K GOLDMaker: Carl F. Bucherer Carl F. Bucherer is a Swiss haute horlogerie company based in Lucerne, Switzerland,which manufactures luxury men's and women's mechanical watches.Since its founding in 1888, the company has been wholly owned by the Bucherer family, making Carl F.Bucherer one of the oldest luxury Swiss watchmakers continuously held by the founding family.The company is run by the original family's third generation, with J?rg G. Bucherer serving as chairman of the board. Carl Bucherer are known for their deluxe watches but gent’s gold accessories are quite rare.