Okay, so it isn't a "fixture" but it is cool! Mid-Century Mailbox in Turquoise/White from Modboxusa.com. Lots of other fun colors available!
make your own midcentury modern mailbox and post
Woo Hoo New House
modern letterbox design, architectural letterbox, contemporary letterbox, mailbox accessories,
Modern Design Letterboxes, Mailboxes
This stainless steel and teak mailbox measures 9W x 12 1/4H x 6D and can also be stained to match your existing woodwork. The mailbox is designed after
FOR THE HOME
Art and Mail with Sun
Exterior Captivating-Mid-Century-Modern-Landscaping-with-mid-century-modern-mailbox-design-ideas Modern Mailbox Post Design Ideas
Postino Mid-Century Modern Mailbox
Pam profiles 10 modern mailboxes -- wall mount and post mount -- that would be right at home at a mid century ranch, colonial or contemporary home.