This Jaeger-LeCoultre Master Grande Tradition Tourbillon Perpetual Calendar, reference 500142A, is a men’s watch that also wears as unisex. The 42mm case and bezel are 18k yellow gold. The white dial has no numerals, only applied markers. A month pointer sits under 12. The date is at 9. The day of the week is at 3. A tourbillon is open at 6, with TOURBILLON and PERPETUEL printed on either side.

The movement is automatic Jaeger-LeCoultre caliber 987. A sapphire crystal covers the dial. Water resistance is 50 meters. The strap is black alligator leather. The watch is in like-new condition and is sold as watch only, with no box or papers. It shows hours, minutes, a perpetual calendar (day, date, month, and leap year), and a tourbillon. Yellow gold against a white dial keeps the face open. This is the 42mm yellow-gold 500142A, not the platinum Q500649A. Jaeger-LeCoultre limited this reference to 300 pieces.