TEXAS INSTRUMENTS 1973 SR-50 Calculator Box Manual Battery Paperwork Untested. I was told its a sr55? I have no clue. Cant figure out the cord either to power it.....Condition is "Used". Shipped with USPS . Thanks forlooking at our items. We take a lot of time going all over the place trying tofind things that are neat. I have beenon eBay 20 years. I'm an honest dealer and try my best. Please e-mail meprior to leaving feedback if there are any problems or concerns with yourpurchase, I will be happy to work with you. Below area few things we like to mention. We hope to see you check out of items again! · We will combine shipping for multiple items. · We must guess at the initial weight. However, afterpackaging and shipping is calculated post sale, difference, if any, will berefunded. · If you are an international bidder and want toopt out of the Global Shipping and go regular international shipping, you MUSTtell me before bidding / buying. · Please examine photos closely as they are part ofmy description and e-mail me with any questions before you bid/buy. Additionalphotos can be sent upon request. · If you make an offer, please be fair. I must payEbay Fees, Paypal Fees, Federal and State Taxes, and the cost of the item. Icannot give huge discounts and I do not make a fortune off these sales. · I do not accept lower offers in the auctionformat. I only add this to auctions because if someone offers more for an itemthan I am asking , so that they can win the auction early, this is the only wayI can do it per eBay policy. · Again, please e-mail me with any questions beforeyou bid/buy. · This is a hobby for me, and we work full timejobs. It may take a day or two for us to reply depending on your request. · Payment is due or communication from buyer is expected within 3days of the auction's end. · I WILL SHIPWORLDWIDE. Usually within 36 hours of cleared payment. · Tracking isfree via First class mail and Priority mail. · I cannot beresponsible for what the post office does if you don't have insurance on theitem. Insurance is not required, but highly suggested. · AllPennsylvania residents must pay sales tax unless you send me an exemption formprior to payment. · If the postoffice damages your item, YOU must initiate the claim per post officeregulations. THANKSSO MUCH FOR LOOKING AND GOOD LUCK!!