Well... I have the 424 already, and to me its highly collectible in that never in Panerai history, you have both a date & a Panerai logo on a Cali dial, and it's crystal not plexiglass. 448 to me less desirable, same dial no date no logo & its a re-edition of 249, this time cheaper in SS. However, 449 may be a different story and differs to 425 without the PIG on the dial, I think to have a PIG on the dial spoils it all. Being a Boutique Edition, to me 449 is considered to be collectible in my book. And of course, I love the blue hands...