Anyone seen this Marketline Quotation Machine before?

[Wieds210]

I recently found a Marketline portable Stock Quotation Machine at an Estate sale. The machine is from the early seventies and was designed for public use and is considered the market’s first portable computer. You could not buy the machine, you had to lease it from Marketline. To get a stock quote from Nasdaq, Amex, or the NYSE, you plug in the machine, place the phone receiver in the bed of the machine, type in the stock code, You would place and a stock price would appear in the display screen.Has anybody ever seen one of these before or have any information they could share. I have read newspaper articles from the early 70’s but am in search of any other info. Thanks and all the best. I have placed the machine for sale on eBay but have no idea of the value. Let me know if the machine is if interest to anyone.