Mon-Fri, 9am-5pm by appointment only; Sat-Sun, closed
1 at 28th St.
When everyone’s given up on that vintage purse or fragile antique quilt, call Alan Spielvogel, director of technical services at the NCA, to discuss it. He’ll look at anything, and often he’ll take on a challenge that no one else will. (And yes, he really did clean two of Lincoln’s hats.) Pricing is case-by-case, with one-of-a-kind charges for one-of-a-kind items.