the Nadals that are advertised as 20g watches are all that weight without strap... only the latest one from this year is weighted at 15g but this is some kind of advertising video not from the collector so not sure about that either... I think that one collector from Japan from this forum had 3 of the first Nadal watches and posted them on scale on strap way above advertised 20 and 21 grams... something about 32, 36 and 38...