Certificate of Involvement in the 1916 Rising

"This Certificate was awarded to Joseph O'Connor, captain of a company third battalion under Eamonn de Valera. The document appears to be signed by DeValera and was issued in 1944. It was found in a shop called Kavanaghs in Dublin in the 1970s along with other related items such as uniforms and rifles, currently held by the national museum in Dublin I bought it at an in Newry in recent years. "