It's a 17''' SAV (savonette) PS (petite seconde) caliber
Has already been said the pocket watches which houses this caliber..
If you want to find the same antique and traditional design in a PP wrist movement, you have to look the 12-120 caliber... I think one of the most beautiful wristwatch movement ever made, beautiful architecture and prefectly handcraft finish...
Made from 1935 to 1953 in 24.188 pieces, the references which houses it : 96, 1435, 1510, 1527, 1528, 1534, 1543 1565, 1571, 1582, 1583, 1584, 2405, 2428, 2431, 2439, 2459, 2478 and 2511
One example :
Best Regards, Thomas