The ref. 310.021 Langematik Perpetual Calendar was introduced in 2001. It features a yellow case of 38.5mm and a champagne dial. It came with a watchwinder. The corrector button at 10:00 was changed to a recessed one in 2004.


The ref. 310.021 Langematik Perpetual Calendar was introduced in 2001. It features a yellow case of 38.5mm and a champagne dial. It came with a watchwinder. The corrector button at 10:00 was changed to a recessed one in 2004.
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