05/02/2026
Here we have a Patek Philippe Perpetual Calendar Ref. 3940J – Second Series (1988–1989) produced in the year 1988. This watch has an early 2nd Series 1987 to circa 1989 - Dial Type 1.
So hoe do you recognise this particular ex*****on of the 2nd series? In the production of the Patek Philippe 3940 (1985–2007), there were several evolution stages of the dial. The 2nd Series occurred after the very early 1st Series and is commonly split into early and late variants. Type 1 generally refers to the early 2nd Series before the later modifications (like cross-hairs) were introduced. 
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Key Visual Features of a 2nd Series Type 1 Dial
1. Beveled / Raised Calendar Windows
• Unlike the 1st Series, where the day and month indicators are printed flat and flush, the 2nd Series Type 1 introduces sloping or beveled surfaces for these indications.
• This gives the dial a subtle depth effect — the subdials appear slightly more sculpted rather than flat on the surface. 
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2. Sub-Dial Layout
• The sub-dials at 3 and 9 o’clock are sunken with beveled edges.
• They are visually more recessed and have a sloped cut from dial surface to subdial. 
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3. DIAL TEXT Changes
• The PATEK PHILIPPE and GENÈVE text is slightly larger and bolder compared to the 1st Series.
• The accent on the second “E” in GENÈVE present in the 1st Series is gone in the 2nd Series. 
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4. Typeface & Font
• The 2nd Series retains the traditional serif font used in the 1st Series (so it still reads classic and slightly old-fashioned compared to later series), but with the changes above it looks more balanced and modern than the very early dial. 
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5. No Crosshairs
• A defining point of the Type 1 (early 2nd Series) is the absence of crosshairs on the leap-year sub-dial at 3 o’clock.
• In later (late 2nd Series) dials, you’ll see crosshairs dividing that subdial — that is not present on Type 1. 
Check also the article from on and Ben Dunn from & on . These guys did all the proper research. I just found a super nice example in a crazy good condition with rare Italian calendar. Straight from the vault from an Italian collector. Get it!