I think the silhouette is classic, but, personally I tend to think only those bags that have been in production for 40+ years plus are truly classics (so the speedy, alma, and noe). It’s not that others can’t or won’t become classics (the Neverfull, to me, is well on its way), but classic means it’s stood the test of time even as fashion changes. And, as the lockme range, I believe has only been around since 2016 or so, I am not sure if it will become a classic. What I will say is buy what you feel like you will wear and enjoy for the next several years. There is no point in buying a classic bag if you won’t enjoy carrying it over the next few years. These bags are expensive, so buy what you love.