Signature Keystone Post Mount Locking Mailbox

Gaines Signature Series Keystone Decorative Mailboxes
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Retail Price:$358.62
Our Price:$311.84
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  • With the Gaines Signature Keystone Locking Mailbox collection it’s easy to get everything you want.
  • Made from cast aluminum and covered with a powder coat pain finish that will never rust, you can count on these locking mailboxes to be low-to-no maintenance.
  • Available in 6 colors and 4 accent finishes creating a unique mailbox designed just for your home.
  • Raised US Mail letters cast a shadow and add dimension to the mailbox front.
  • Letters and Flags are made of solid brass or aluminum and come in Verde Brass, Satin Nickel, Polish Brass and Antique Bronze finishes.
  • Personalize your mailbox by adding your street name and address to the side of the mailbox in 7 year vinyl letters that match the color of the locking mailbox’s accents.
  • Need an address plaque for your house? Check out our selection of Gaines HouseMark address plaques which coordinate with our Signature Keystone Post Mount Locking Mailbox collection.
  • Each USPS approved locking mailbox comes with a locking insert and 2 keys. Order yours today!
  • See more Locking Mailboxes.
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Product Details


Item Height (inches) Width (inches) Depth (inches)
Mailbox 12.25" 10.375" 20.125"


  • Mailbox Item Number: GMMKSSIG
  • Locking Insert Item Number: GMZMKSLOCKING
  • Includes: Mailbox, Locking Insert with 2 Keys
  • Manufacturer: Gaines Manufacturing
  • Shipping Weight: 18 lbs.
  • Locking: Locking mailbox.

Additional Images

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