The Patek Phillipe Annual Calendar 4948 is a larger version of Patek's ladies annual calendar watch; it's case measures 38mm across. It is powered by the trusted caliber 324 S QA LU. The 4938 features a fully diamond-set case, whereas reference 4937 features a diamond-set bezel.
Mechanical self-winding movement
Caliber 324 S QA LU
Day and month by hands
Date in an aperture
Center sweep second hand
Case set with 347 diamonds (~2.65 ct)
Crown set with 14 diamonds (~0.06 ct)
White Balinese mother-of-pearl dial, gold applied numerals
Alligator strap with square scales, hand-stitched, matte pearly white, prong buckle set with 27 diamonds (~0.21 ct).
Sapphire-crystal case back
Water resistant to 30 m
Case diameter: 38 mm