J Factory published the new Jaeger-LeCoultre Master Ultra Thin Perpetual better than other editions.The diameter is 39mm, the same as the genuine, and the thickness is 10.5 mm, only 1 mm gap compared with genuine, other versions like TWF and V9F, the thickness is up to 11.2mm, also V9, the moonphase, will run one circle for 24 hours, and V9 and TWF, the years only have 2017-2024 can be adjusted, after 2024, customers need to return to factory for changing the year wheel, free of charge.
 
Four options from JF, stainless steel and rose gold plated cases, silver/black/grey sunburst dial, and the rose gold one has a eggshell color face, all of them keeps and remain a balanced and harmony layout: moonphase at 12,  year indicator between 6 and 7, while at 3, 6 and 9′ clock: they are month, week and date sub-dials. Classic Dauphine style hands are finined: one half brushed and one half sandblasting. The dial color, hands, and texture are 98% closer to gen, powered by clone Cal.868/1 automatic movement, with all functions. The strap is calfskin material with the folding clasps, engraved with JLC logo.

Use a pusher setting tool to click the button at the case side to adjust the month, then the year (2008-2028) advances, likewise, pull the crown to the first position to adjust the 24 hours time by clockwise, the date advances, if anti-clockwise to set 24 hours time, the moon phase advances, moonphase runs one circle for a month. The second position to set the 24 hours time, after adjusting a sufficient number of time, week advances. There is a security zone indicator above the hands, to warn when not to adjust the movement, when it is white, you can adjust the month and year, while it turns to blue, it is banned.