My response was referenced/cited from: George Harrison’s “Rocky” Fender Stratocaster Guitar | FeelNumb.com
In a consolidated version: When The Beatles were in the studio recording “Help!“, John Lennon and George sent roadie Mal Evans out to go get a couple of Fender Stratocasters. Evans came back with matching 1962 Sonic Blue Strats. Both Strats had maple necks & John soon customized his with a rosewood fretboard, ashtray cover & mint green- pick guard. In weeks to come, George would customize his strat, quite similar (rosewood fret & mint guard) and the guitar would eventually be custom painted into the NOTORIOUS "Rocky" which we know today.
George first played the original, maple neck & fret (pre-rocky) Sonic Blue strat on “You’re Going To Lose That Girl.”
On “Nowhere Man,” both John and George played their Strats together.
The bright, sparkling tone is evident in George’s ringing chord-melody solo.