Don't know if my attempt to post the item will work, but here goes. Mine looks like this one.

http://cgi.ebay.com/Oscar-Schmidt-Silvertone-Autoharp-/350480613985?pt=LH_DefaultDomain_0&hash=item519a45c261#ht_4213wt_838

The buttons are trapezoidal(?), plastic bars, sharp corners. The case is black and white and in excellent condition. It came with about 15 extra strings and a chromatic tuner.