Omega Speedmaster Mark 4.5 176.0016 Lemania 5100 Chronograph

Here is my stunningly cool vintage Omega MK 4.5 Speedmaster vintage chronograph in the rarer tonneau case shape, reference 176.0016. This watch leverages the famous Lemania 5100 movement (aka Omega caliber 1045), with its central minute counter hand and 24 hour day / night indicator. This is one of the coolest Mark watches to me, as it has the infrequently seen grey / black dial. In addition, according to chronograph legend Chuck Maddox, this tends to be one of the least common Mark 4.5 references.

The watch is in good condition, especially when considering its age. The case does not look beaten, with only a couple minor marks on the sides; the most prominent mark is on the side, near the 2 o'clock position. The mineral crystal has some small desk diving scratches, but they are simply not noticeable when the watch is worn. The dial appears very clean, and importantly, the movement and chronograph are both operating well (please see timegrapher picture below).

The watch comes on a period appropriate unsigned bracelet, making it comfortable and aesthetically pleasasnt on the wrist. A couple additional bracelet links are included for resizing.

Asking $1,695 shipped CONUS. Please add $45 for international.

Or trade for?

Some references:
http://forums.watchuseek.com/f63/zack-zack-ji-great-seller-970739.html
http://forums.watchuseek.com/f63/zacks-legend-976297.html
http://forums.watchuseek.com/f63/zack-excallent-seller-993804.html
http://forums.watchuseek.com/f63/great-trade-zack-1017808.html
http://forums.watchuseek.com/f63/perfect-transaction-zack-1023180.html
https://www.rolexforums.com/showthread.php?t=515853&highlight=jizjizjiz
https://www.rolexforums.com/showthread.php?t=455554&highlight=jizjizjiz
https://www.rolexforums.com/showthread.php?t=406163&highlight=jizjizjiz
https://www.rolexforums.com/showthread.php?t=400029&highlight=jizjizjiz
https://www.rolexforums.com/showthread.php?t=390108&highlight=jizjizjiz