Explorer I and Explorer II Are Different Buying Decisions
If you want the clean 3-6-9 dial and understated sports-watch layout, the Explorer I side of this category is the relevant place to start. Ref. 214270 is one of the key modern references represented in replica listings.
Explorer II models are visually more complex. References such as 16570, 216570 and 226570 use a fixed 24-hour bezel and a dedicated 24-hour hand. Case size, hand proportions and dial generation therefore matter more here than they do on Explorer I.
Black vs. White Explorer II Dials
Explorer II is commonly associated with both black and white “Polar” dial styles. When comparing two versions, focus on hand shape, bezel engraving, hour-marker proportions and the relationship between the 24-hour hand and dial printing.
The category should help you decide between two different Explorer concepts first; factory and movement labels come after that.