Receive the two vintage Texas Instruments ICs shown. 6620A indicates that part was manufactured in 1966, 20th week. 6630A indicates that part was manufactured in 1966, 30th week. The 600D2 and D4 codes indicate contractors like IBM ordered the parts from Texas Instruments, which required stricter testing standards. We obtained these items from an estate sale of someone who worked for IBM. Each component has the Texas Instruments logo. Measurements are shown in the pictures. Please review condition description.As a top rated seller, we take great pride in providing a high level of customer service. This includes ensuring your items are well packaged and shipped out quickly. The vast majority of the time, the price you pay for shipping costs us more when factoring in fees, shipping supplies, and insurance. The response from our customers shows clear appreciation for the extra effort we put in to protect items from shipping exposure. We will search for the cheapest method available on and will include more than one shipping method when it makes sense to do so. After packing an item, the size sometimes extends the cost beyond the price you pay. If this happens, we may use a different carrier to get your item to you. If you receive an item from us and there is damage, please keep all shipping materials and notify us asap. If you have any questions about shipping cost, please feel free to message us. As a small family run business, we appreciate the opportunity to serve you. Thank you!