This is a fairly large 1940’s 35.5mm. chrome plated and stainless steel back NISUS chronograph. Look at the very interesting LARGE and flat pushers. The movement is the fine and famous VALJOUX 23 column wheel chronograph, just serviced and working perfectly. The dial has acquired a fine patina over the years and retains the original blued steel pencil hands and sweep seconds. Notice the multi-coloured red and blue outer scales. The case displays excellent overall condition. This is a very fine vintage chronograph which will provide many more decades of enjoyment on your wrist.