These are unused black block inlay stickers. I bought them for my Lakland 55-02 (maple board) and the last couple weren't quite big enough to cover the existing dot marker. Here's a link to the seller (with pics and specs.) on Ebay:
http://http://cgi.ebay.com/ws/eBayIS...m=150550028427
These cost $12 from Ebay. My price: $10 shipped.