HP 35 Scientific Calculator & Case early V2 USA Made 1143A Serial CLEAN TESTED

Description

This listing is for an early HP 35 scientific calculator, the first pocket scientific calculator. This is an early example of the second version introduced after the first batch of 10000 sold out ahead of HP's expectations. This was made in the USA before manufacturing was moved to Singapore and has an early serial number label starting with 1143A, which was the first version serial.
It works as it should, cosmetics are very good, noting some wear on the silver line above the power button and includes an alkaline battery holder and a vinyl case in excellent condition.
I'll admit to being a big fan of calculators and slide rules. I started my engineering career just as they were beginning to become affordable to engineers, although us juniors could only afford the Commodore equivalents. It's truly amazing what HP achieved in terms of hardware durability that these are still working well heading for 50 years and also in the efficiency of their coding that squeezed all that functionality into a 1k ROM.
This will be shipped via First Class or
Priority Mail as you choose.
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Shipping quoted is for US lower 48 only, plus other locations served by USPS at domestic rates. Other US territories including US Military, please check for shipping before bidding. I ship internationally only via ebay Global Shipping
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COLORADO SALES TAX CHANGE 1st December 2018.
As of this date, as a Colorado-based business, I am required to charge sales tax based on your location in Colorado rather than my location. Based on my in-state sales volume, the way I am going to do this is set a flat rate of 9% and refund the difference BEFORE I SHIP. As I'm human (I hope), I will forget occasionally, so please remind me if necessary. If you are in a location where the sales tax is above 9% and below 10%, I will absorb that difference. If your location is charging 10% or more, I will send a message requesting payment of the difference by Paypal. I hope that this will be a short term situation as ebay is progressively automating sales tax collection state by state.