Hi. I have a Leresche Razor that weights 68grams. Can someone with knowledge of the Leresche line-up of DE Razors tell me which set this Razor belongs too? This Razor came to me as belonging to the #51 Set. Other owners of this set have Razors that weigh 76grams. Its a great shaver even at the lighter weight. I'm just confused as to why mine is lighter. Thanks for your help.