Side by side
Sheffield 1A 40mmvsUndone Aero Worldtimer "Doolittle"
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
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At a glance
7 of 29 specs differDiameter
1A 40mm40mm
Aero Worldtimer "Doolittle"40mm
Power Reserve
1A 40mm—
Aero Worldtimer "Doolittle"—
Water Resistance
1A 40mm200m
Aero Worldtimer "Doolittle"100m
MSRP
1A 40mm$228
Aero Worldtimer "Doolittle"$399
Full specifications
Case
4 specsThickness
13mm
15mm
Lug-to-Lug
48mm
0mm
Lug Width
20mm
0mm
Water Resistance
200m
100m
Crystal & Dial
1 specsCrystal
Sapphire
—
Movement
1 specsPower Reserve
0h
—
Pricing
1 specsMSRP
$228
$399
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