The Option-al Landlist — SX-70 Cameras - Folding Models
Polaroid SX-70 Alpha Prototype Sonar Chrome Folding Instant Film Camer
Polaroid SX-70: Model 1 vs Alpha 1 - MiNT Camera Blog
Mint Camera SLR670-X ZERO Instant Camera SLR670-X ZERO B&H Photo
File:Vintage Polaroid SX-70 Land Camera Alpha 1 Model 2, Same Features As The SX-70 Model 1 Except Finished In Black Plastic And Brown Porvair, Made In USA, Instruction Booklet Dated 3 77 (35836751016).jpg - Wikimedia Commons