Panerai Radiomir 1940 3 Days

I have a Panerai 620 watch for sale or trade.  This is the 42mm, 1940 Radiomir 3 day automatic
watch with a limited production of 500 watches.  I purchased my 620 new in 05/2016 and, as seen
in the figures below, it is in mint condition.  My 620 comes complete with all boxes, papers, and
AD stamped warranty card.  The OEM leather strap is unworn as I put it on an OEM rubber strap (with
aftermarket tang buckle) as soon as I received it.  This strap will be included in any sale/trade.

The 620 Radiomir has the in house P.4000 calibre with micro-rotor which makes the overall thinkness
of the cased watch just under 11mm.  The watch is black with luminous Arabic numerals and hour
markers, small seconds at 9 o'clock, and water resistant to 100m.

I am asking $8100 for this watch which includes shipping in the CONUS.  As far as trades go I will
consider all offers up/down and am particularly interested in Rolex Explorer II (black dial),
Rolex Sea Dweller, Vacheron Overseas, Blancpain Bathyscaphe, and JLC Master Compressor 2.  Please
email me at [Email address suppressed for privacy] if you have any questions. 

Cheers,

Jonathan