I think this one is Circa 1910 - 1920's. It is 9 1/4" x 4 1/2" in size and has had a new spring fitted on the back for the letter slot.
12 other shoppers have this item in their Cart or Wish List
At Molloy's MEGA ANTIQUES CENTRE, Takapuna, Auckland, New Zealand
Specialists in Pacific Islands Items, Victoriana, And a Fascinating Range of General Collectibles