The bezel is a service replacement--Rolex uses the 16570 bezels for service replacement.
The handset are service replacement, but the dial looks like it's original based on the lume patina.
Yes, the earliest 16550's (i.e. cream dials) had the white gold surrounds on the plots and hands
The open 6 and 9 date wheel is a classic feature on the 16550...I wish I can get one for my 16570.
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