Like the ones seen in the pictures. Parts or complete. If you are a manufacturer who can make them, please write in. I have also seen these fitted to American cars like Willys Knight. (Pictures borrowed from the internet)
For sale a J.E Malivert Paris Oleometer for a variety of French cars from the 1920s, in original, used and not functional condition, to be restored. The glass is also broken. 63 mm outside diameter and 60 mm built-in. Shipping worldwide with shipping costs extra and payment by PayPal accepted. For more information and pictures on request.