Bearing reference 1303520, this Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar replica puts a full perpetual calendar into a white gold case that reads like steel on camera but feels distinctly different on the wrist. White gold carries a density roughly fifty percent higher than stainless steel, which translates to a weighted, grounded sensation every time you check the time. The silvered dial puts the calendar on the four cardinal points: day of the week at nine o’clock, date at three, month with its year counter at six, moon phase at twelve. Blued hands are the only color on an otherwise monochrome face, and the applied indices run between the registers, so the four indications are read in one pass instead of one window at a time.

Case & Movement Specs

• Reference: 1303520
• Case material: white gold
• Dial: silvered, applied indices, blued hands
• Crystal: sapphire with anti-reflective coating
• Functions: perpetual calendar (day at 9, date at 3, month with year at 6, moon phase at 12), hours, minutes, seconds
• Movement: clone Cal. 868, automatic, 28,800 vph
• Power reserve: 40 hours (genuine Cal. 868: 43 hours)
• Water resistance: 50 m (same as genuine)
• Strap: black alligator with pin buckle

White gold references from Jaeger-LeCoultre typically feature rhodium plating that gives the case a bright, cool finish. Over time this surface develops character that distinguishes it from any steel counterpart.

Caliber Breakdown

The movement inside the 1303520 is a clone Cal. 868, automatic, 28,800 vph, with a power reserve of 40 hours where the genuine Cal. 868 holds 43 hours. Its slim rotor profile allows the overall case thickness to remain in dress-watch territory even with an automatic winding system on board. The calendar is not a single date disc: day, date, month and moon phase are driven from one calendar works that steps the whole set over at midnight, and a perpetual calendar holds the length of every month, leap years included, so nothing on the dial needs correcting in February or after a 30-day month. Water resistance is 50 m, the same as the genuine reference. For more options in the range, browse our Ultra Thin Master collection. The 1362511 Moon 39 sits one step below in the same range: a rose gold case with moon phase and a pointer date, with no day, month or year to keep in step. Setting the two next to each other separates what the white gold changes from what the perpetual calendar changes.

How It Compares

Compared to the rose gold Q1282510 in this collection, white gold makes a quieter entrance. There is no warm tone announcing itself across the room. Instead the 1303520 works through subtlety, revealing its precious-metal status only to those who pick it up or examine the caseback engraving. If understated precious metal appeals more than visible warmth, this JLC Master Ultra Thin super clone is the version that delivers exactly that balance.

White gold says nothing about itself, which is the whole appeal, and the white gold Ultra Thin Master listings put the 1303520 next to the tourbillon cased in the same metal. The grade for it is in how this calendar scores in our JLC super clone guide.

Specifications

• Model: Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar
• Reference: 1303520
• Case: white gold
• Case size: 39 mm
• Dial: silvered, applied indices, blued hands
• Complications: perpetual calendar – day of the week at 9, date at 3, month with year counter at 6, moon phase at 12
• Movement: clone Cal. 868, automatic, 28,800 vph
• Power reserve: 40 hours (genuine Cal. 868: 43 hours)
• Water resistance: 50 m (same as genuine)
• Crystal: sapphire
• Strap: black alligator with pin buckle