The Omega Speedmaster 3520.50 puts a full calendar inside a compact automatic chronograph, without giving up the black-dial, tachymeter-bezel character that draws people to the family. Its pointer date runs around the dial’s edge, while day and month windows sit within the upper subdial—a busy arrangement, but one with a satisfying logic once you learn your way around it.
Often called the Triple Date, this is a different proposition from the hand-wound Moonwatch: smaller on the wrist, mechanically more involved, and distinctly its own watch. The automatic caliber 1151, derived from the Valjoux 7751, also supplies a 24-hour indication beside the running seconds. When assessing one, pay particular attention to the calendar: the pointer date, day and month should all advance correctly, and the recessed day corrector deserves a functional check rather than being overlooked.
Recent Forum Listings
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Omega Omega Speedmaster Triple Date Mk40 Ref. 3520.50.00 | B… $2,550 -
Omega 1996 Omega Speedmaster Mark 40 “Triple Date” Tritium D… $2,400 -
Omega Omega Speedmaster 39mm - 3520.50 - Serviced - Boxes - … $2,445 -
Omega FT: Omega Speedmaster Mark 40 - Triple Date 3520.50 Ju… $3,500 -
Omega Omega Speedmaster Triple Date 3520.50 Mk40 $2,650
Speedmaster References at a Similar Price
All 88 Speedmaster references →-
#1
Omega Speedmaster Day-Date 40mm$2,487 $2,283 – $2,80022 listings 1 month ago -
#2
Omega Speedmaster Date$2,493 $2,100 – $2,875154 listings 2 days ago -
#3
Omega Speedmaster 3210.52 40mm$2,532 $2,340 – $2,58711 listings 1 day ago -
#4
Omega Speedmaster 3211.31 40mm$2,553 $2,232 – $2,65012 listings 5 months ago -
#5
Omega Speedmaster 3523.80 39mm$2,299 $2,041 – $2,39532 listings 18 hours ago
Other Omega Models
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#1
Omega Speedmaster Gold 42mm$7,802 $2,888 – $15,80411 listings 3 weeks ago -
#2
Omega Speedmaster Moonphase$4,896 $4,100 – $4,96913 listings 5 months ago -
#3
Omega Speedmaster Moonwatch 42mm$5,812 $4,875 – $7,000163 listings 1 day ago -
#4
Omega Speedmaster Olympic4 listings 3 months ago -
#5
Omega Speedmaster Racing 44.3mm$3,480 $3,225 – $3,92422 listings 4 days ago -
#6
Omega Seamaster Diver 300M 4th Gen 42mm$4,750 $4,317 – $5,4981,325 listings 15 hours ago -
#7
Omega Seamaster Aqua Terra 150M 41mm$4,750 $4,200 – $5,499582 listings 23 hours ago -
#8
Omega Seamaster 41mm$1,000 $750 – $1,826387 listings 21 hours ago -
#9
Omega Seamaster Diver 300M 42mm$3,899 $3,133 – $4,500380 listings 2 days ago -
#10
Omega Seamaster Aqua Terra Cal. 8500 38.5mm$3,426 $2,999 – $3,900344 listings 18 hours ago
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