This is an Omega Speedmaster 3570.50 full set (inner and outer boxes, warranty cards and sleeve, instruction book, hang tag, and extra link).
The Speedmaster is on a bracelet sized for my 7.5" wrist and it has the hesalite crystal. The movement is an 1861.
It is in good condition with some minor signs of use. All functions work properly.

The Mitsukoshi dial is still sealed in its Omega container as I received it. The black hand set is included in case you would like to keep the small white hands for the three subdials and swap out the larger hands for contrast with the white dial.

I've decided that chronographs aren't for me so I'm selling this and two other vintage chronographs.

Price:
$3,950 - no trades please

Buyers:
For established CONUS/Canada WUS members with references: Zelle or Paypal. I'll pay for tracked shipping in CONUS/Canada to your confirmed Paypal address.

Others CONUS/Canada WUS members without references: Zelle or bank transfer. I'll pay for tracked shipping in CONUS/Canada.

International buyers: sorry, not for this item.

My references:
Multiple transactions on WUS as buyer and seller.
Lots of feedback on WUS... just search for my username here: https://forums.watchuseek.com/f63/