Used Kowa Six/Sixty Six "Clear Spot II" focusing screen with dashed horizontal lines as shown. Not sure is the lines were put there by a previous owner or factory. Look to possibly delineate a panorama? Due to the lines this is being sold as-is, no return unless not as described. 

WHO WE ARE: Oddog2 is a husband/wife team, home-based small business specializing in the buying/refurbishment/selling of primarily photographic equipment. We do occasionally have other types of things to sell that come to us as a result of our search for camera-related items. We have over 50 years of experience with photographic equipment, both as a shooter (17 years newspaper photojournalist) and as a collector/restorer/seller. We have been on eBay as Oddog or Oddog2 since September 1999.