Jaeger LeCoultre circa

Hello,
I have a very nice and very rare circa 1970 Jaeger-leCoultre Geomatic chronometer wristwatch, 37mm w/o crown, 23 jewel Jaeger LeCoultre K883S chronometer-rated automatic movement adjusted to five positions and temperature, with semi-quickset date and hacking seconds, solid 18K yellow gold case with crisp and beautifully preserved special caseback Geomatic medallion, the watch has the original crown and, most importantly, an absolutely beautiful factory-original solid gold dial that has hand-engraved with a pattern that is hard to describe but looks like linen combined with raindrops on a window! Watch was serviced within the past year and is keeping excellent time. These 18k Jaeger Lecoultre Geomatics are desirable by themselves, but when you add the 18k gold case, the limited number made of this model in gold (only 478 production), and the exceptional gold engraved dial, you've got a pretty nice package of a watch. Comes on a Sirtoli blue padded alligator strap with a butterfly-style gold-plated clasp. The watch came to me with, of all things, a vintage Patek Philippe 18kyg buckle that will be included.
Will sell this watch for a very reasonable $4500, + $50 shipping. Will consider any and all trades of a value in the $4500-$5000 range. 
You will not see another 18kyg Geomatic, especially with a gold engraved dial, so this is an opportunity that won't come along again any time soon!