Apple Watch Classic Buckle band is the lightest band? 19 Grams?!

[whocaresit]

Can anyone please confirm, is the Classic buckle band really lighter than the Sport band?
(19 Grams vs 40 Grams)

https://www.apple.com/watch/apple-watch/stainless-steel-case-black-classic-buckle/
Classic buckle band is 19 GRAMS for 42mm?

http://www.apple.com/watch/apple-watch-sport/space-gray-aluminum-case-black-sport-band/
Black Sport band is 40 GRAMS for 42 mm?

I cannot seem to get my mind around it.. I thought the fluoroelastomer band would be lightest of all...

 

[anez]

I just weighed my two small size WSBs for the 38mm, and it came up as 29g. I'm afraid I don't have any others to compare them to, though.

I'm guessing the 40g is the upper limit, i.e., for the 42mm in the larger size?