Celluloid "mint green" three layer pickguard, with 11 attachment screws (some1959 transitional models have only 9 or 10 screws).
Also a thin aluminum shield the size of the pickguard is installed underneath the pickguard.1961 Stratocaster : Peghead decal logo now has 2 patent numbers (2,573,254 & 2,741,146) 1962 Stratocaster : Peghead decal logo now has 3 patent numbers (2,960,900 added) Mid 1962 Stratocaster : Veneer Rosewood fingerboard.
Fender hasnt recently made any significant changes in the tube line with their attention focusing on solid state and digital technology.
Whether it’s a vintage amp or a recent model such as this Fender Pro Reverb, hum can have several causes.
Walnut "skunk stripe" down back of neck where truss rod was installed.
Around 1996-97 - Fender virtually stopped using Tweed on regular production model tube amps. The Blues Deluxe and Blues Deville got up-graded to Hot Rod status with an extra foot switch-able lead boost added for a quasi-3rd channel.