In the late 1920's many of Hamilton watches were called "geometrics" where the models were named based on their shape. One of the models was called the Tonneau.
Introduced in 1927, the Tonneau looks like a barrel on it's side, where the top and bottom is curved and the sides are flat. The Tonneau was produced through 1932 and came in both solid gold and gold filled, and in green and white gold initially and yellow gold in later years..
In addition, case styles came with both engraved and un-engraved. The models are usually called Tonneau Engraved and Tonneau Plain, respectively.
The Tonneau features Hamilton's 17 jewel, 6/0 sized 987 movement. It's a good sized watch and wears well on the wrist.
Here's a wrist shot of a green gold filled Tonneau Plain model.
and here's a white Tonneau Plain.
and here's a pair of freshly serviced and re-enameled Tonneau Engraved watches in white and yellow.
Even the Tonneau Plain model is engraved on the sides of the center case.
The Tonneau is a sharp looking watch and even though all my examples have luminous dials, black enamel dialed and applied gold numeral varieties can also be obtained.
Thanks for visiting my vintage Hamilton watch blog. I like to restore US-made Hamilton wrist watches back to their original glory and share my experiences with other enthusiasts. Use the "Search" space below if you know what model you're looking for. Feel free to leave polite comments or questions in the spaces provided. Also check out my "watches for sale" on my Etsy site - the link is on the right, just below.