The Vintage Tubbs Dilator Cardiology Instrument by V. Mueller & Co. SS is a collectible medical device from the United States. This unique and historical tool would have been used in cardiology to assist in dilating blood vessels for various medical procedures. With its vintage design and significance in the field of medicine, this instrument would be a valuable addition to any collection of medical artifacts or equipment from the mid-20th century. For collectors only, not intended for any medical purposes. Great working condition. Nice item.