This Tiffany pin has such interesting design, it makes me think somewhat of origami work. Note the amazing design detail. The beautiful rounded curves to each of the four square sections as well as their evenly mitered centers. And finally the thin directional fine ridged lines thru out all of the squares.
The gold is in excellent plus condition with no cracks, rips, dents, holes, abrasions, scratches or repairs. It has two original pin sticks. One fits in a double circle form of enclosure so as not to stab you. The other fits into a locking clasp. The pin hinge, and locking clasp are in smooth working order with the hinge having limited range of movement. The pin sticks have some curve but good points.
The marks are on the side of the elevated foot for the pin hinge as seen in the insert on the last photo. It reads: TIFFANY & Co. 750 (European for 18kt. gold). As you can see from the backside photo the pin sits at an angle. So measuring from point to point of the square shape the pin is 2" wide x 2" tall with the actual square being 1 3/8".