Time is best when shared, according to the Swiss watchmaker Montblanc, which has released a limited run of 58 pairs of his-and-hers watches—available only as a set ($103,200)—with matching dials combining mother-of-pearl and red gold. The Seconde Authentique Pour Elle et Lui features a mechanical Calibre MB M62.00 movement, which is made in Montblanc’s Villeret manufacture. The rhodium-plated silver bridge is beveled and hand embellished with Geneva waves. The watch features a slow-beat 2.5 Hz balance. The 18-…