I ended up convincing myself that the IWA20081 that IWC originally shipped my AD is the same strap as my original with only two minor differences:
1) The strap sizes are funky now. The tail portion is unbelievably long, and the buckle segment/piece is short. They claim that they intentionally redesigned it for better fit and comfort with the deployant.
2) The color looks quite different, but I'm hoping that a similar patina will eventually develop. Seems like it is in the right general neighborhood. It just needs to age, darken, and pick up some character on some of the more exposed areas. Otherwise, why on earth would I spend this much on a calf strap (grin).
- By the way, this is the same strap shown in the 2007 workbook (croc brown).
THANK YOU GUYS VERY MUCH FOR YOUR HELP. This was invaluable in my decision process.