Walter Lange, the great-grandson of the founder of German luxury watchmaker A. Lange & Söhne passed away last year, on the second day of the 2017 edition Salon International de la Haute Horlogerie (SIHH). This year, ahead of the SIHH opening, A Lange & Sohne unveiled the 1815 Walter Lange to pay homage to the late legendary watchmaker.

The timepiece features a stoppable jumping seconds hand – a movement that was invented by Ferdinand Adolph Lange almost 150 years ago.

“When Walter came to visit us at the manufacture, chances were, he’d ask us about whether we’ve made the ‘jumping second’ watch,” says Tino Bobe, the maison’s director of manufacturing. “So it [didn’t need] a long discussion to we decide to make the piece he wished for to honour him.”

The new calibre, called L1924, refers to Walter’s birth year, while the first three digits of the reference number, 297, recall his date of birth. The watch is available in three editions – 145 watches in white gold, 90 in pink gold and 27 in yellow gold. A unique steel case version with a black enamel dial will be auctioned for charity later this year.