The product is a block of four US first day cover, #1065 featuring Michigan and Penn State University grant, issued in 1955. The covers have a 3 cent denomination and are in green color. They are cancelled with First Day of Issue cancellation. The certification is not provided. These FDCs are from the United States and are a collectible piece of postal history related to education. University Land Grant 100 Year  Cachet Craft, Ken Boll