Jimmy Page

The book "Whole Lotta Led Zeppelin," by Jon Bream, Robert Alford, and Charles Auringer, states on page 164, "He [Page] preferred heavy-duty Herco 75 picks."

Jimmy can be seen here playing Dazed and Confused with a violin bow. However, these were rejects that he bought in excess rather than using brand-new bows.

Used for “In the Evening”, as reported in this March 2014 Vintage Guitar article. It can also be heard on “Carouselambra”.

Led Zeppelin’s final studio album, 1979’s In Through The Out Door, opens with an eerie, otherworldly drone that weaves and winds its way before segueing into the searing Stratocaster riffs of “In The Evening.” In the past, Jimmy Page played his Les Paul with a violin bow and waved his hands like a wizard over a Theremin. This sound was something new, however – something even more extraordinary.

That drone-like voice came thanks to a Gizmotron, a bizarre and complex mechanical guitar add-on that would make Reuben Goldberg choke with envy. Page explained that it was a “hurdy gurdy-type of thing,” which was astute as the effect worked similarly to the ancient musical instrument that created a violin-like sound with a hand-cranked wheel serving as a mechanical bow.

Page used an Ace guitar strap while in The Yardbirds and The New Yardbirds (Led Zeppelin), as can be seen in the following photographs:

• January 21, 1967, taken by Bob King (main source link)
• April 1967 television broadcast from Chaville (@ 0:49)
• April 13, 1967, taken by Lone Thimsen at Boom Dancing Center
• 1967 (cropped mirror)
• Beat-Club performance (1967)
• January 1968
• June 1, 1968, in Los Angeles, California
• June 4 or 5, 1968, taken by Carolyn Wright at Montgomery International Speedway
• September 7, 1968, taken on by Jørgen Angel at Gladsaxe Teen Club (the first The New Yardbirds / Led Zeppelin show)
• 1968
• 1969

Photos without easily traced date: here, here & here, here, and here