JCF81
116
Thank you for sharing!
Looking at the Aquatimer design, the spring bars are very exposed. The straps (which also appear clipped to the case) have limited rotational movement, and likely semi-rigid? The spring bars do not look like it would help in the event of a strong force that may have momentarily flexed the clips to dismount the strap from the lug.
The EasX-Change design has the spring bars deep seated, and require an L-type motion to dismount. The straps are also free rotating and likely any force applied on the strap, will simply cause the strap to rotate around the spring bars rather than dismount.
The buckle end is a little bit different than on the JLC, as i've observed here in this WPS post --> Here are some pictures from the video.
It appears that on the JLC, a "Push Here" bar that flaps up and down is what prevents the strap bar from disengaging. I wonder with this design, is it possible for the flap to eventually loosen by itself and therefore unguard the strap bar? On the IWC, there is a hook that catches the center of the strap bar. And the hook is integrated to the deployant hinge, as seen on India Whiskey Charlie's photo above, therefore the whole buckle has to move (and in a specific motion) to disengage the strap.
Is the EasX-Change design free of issues? I don't know, and only time will tell. I'm crossing my fingers. 
IWC EasX-Change Short Straps for BP43
After a 5-month wait since the request was made, the short 21mm EasX-Change straps for small wrists have finally arrived! Standard lengths are 135/65mm, while the short one measures at 125/55mm (total 20mm shorter). I'm still waiting for my quick release ...
I’m hoping so.
It helps that winter is just around the corner. Desert summer and leather would have been a different story.
Great concept
Something funny with IWC production-it took my AD 5 months to get a strap for my Top Gun too….
Not too excited about the quick release buckle...
Can't figure out how to undo it and neither could the boutique guys. No instructions available either, at least not yet. ...
IWC’s youtube video seems to show how.
At the 0:20 mark… slide towards the keeper? IWC EasX-Change
Looks scary to me.
The lug end system looks similar to the system on the bronze Aquatimer I sold. The system was prone to inadvertent release with an impact to the outer surface of the strap. Mine fell overboard when my wrist brushed the edge of the windshield. Thankfully I...
Thank you for sharing!
Looking at the Aquatimer design, the spring bars are very exposed. The straps (which also appear clipped to the case) have limited rotational movement, and likely semi-rigid? The spring bars do not look like it would help in the event of a strong force th...
Thank you for the detailed reply!
The systems do appear different and hopefully each are an evolution that is more secure and reliable. I think a design that allows for tool free removal and replacement straps would be great if it also allowed for replacement with conventional nonpropriet...