I can't think of any better provenance for the briefcase's contents.
THE BEATLES: CAVERN MECCA #4 - September 1981 - Original Newsletter
Bob Wooler 1960s Cavern Club Compliments Slip (UK)
Rare 1960s Vintage The Beatles Band Gold Tone Pendant With Textured Hair
Teenbeat Annual 1965 - 1960s Music & Bands, Beatles, Tremeloes, Shadows
Teenbeat Annual 1965 - 1960s Music & Bands, Beatles, Zombies, Hollies, Kinks
VINTAGE 1960S ROLL OF BEATLES WALLPAPER 8 FULL FRAMES
