Stainless Steel vintage Double Insulated Martini Shaker! Shaken not stirred~

Stainless Steel 18/10 vintage Martini Shaker with double insulation. This is not a cheap version. Insert in shake is removeable for cleaning. Heavier piece. Perfect gift for Father's Day or to add to your collection of Vintage Barware. Tried finding this exact one, but could not find it on any site I looked on. Thinking likely late 60's or early 70's . Please note, measurements are approximate. Weight is 1lb 9.4 oz or 722 grams. Sidenote: my scale was not feeling well and the grams seemed to work.