Please help, I purchased this watch online last week for one of my children, I have purchased 3 gucci watches in my life all from authorised dealers, the seller seems to be trustworthy on the surface but something just niggles me because there is no serial number on the back and the other watches I purchased do. The seller assures me this is normal as not all gucci watches have a serial number on the back, but as I recently bought a similar watch from the same range ( diff strap) it just seems strange. I have 2 teenage sons. The son for whom this watch is for has disabilities and I would feel awful if this was not genuine gucci when I know the other one is for certain.