It’s a pristine piece of Silicon Valley history — and it comes with a famous autograph. A check that Apple co-founder Steve Jobs made out to Radio Shack on July 23, 1976, just months after the pioneering computer company was founded, has gone up for auction. The latest bid tops $30,000, with less than a day remaining in the sale by RR Auction. Bidding will close Wednesday, Dec. 6, with any initial bids required by 3 p.m. PST. The check is made out on an Apple Computer Company account opened at a Wells Fargo branch in Los Altos. Listed is Apple’s first official address at 770 Welch Rd., Ste. 15…