You may have seen this unusual cocktail mixer before, but I doubt you've ever seen it in this exceptional condition.

Rather than the standard cocktail shaker top, it features an integrated internal plunger/mixer mechanism capped with a distinctive teardrop-shaped black wooden handle.
Unique Characteristics
A very similar cocktail mixer is prominently displayed on page 158 in Stephen Visakay's The Cocktail Shaker.

It stands 12" tall and is 3.75" in diameter at the top. It is stamped "PAT. PENDING".

This item has been in my personal collection since 1988 and has been very well cared for. It is in excellent condition for its 90-plus years of age, with minor flaws as noted. A similar item in lesser condition is currently listed on 1st Dibs for $550.00.

Buyer pays for handling, insurance, and shipping from 27511 (NC).