This is a vintage 1968 Zippo Slim lighter. The surface of the case has a series of angle lines with a clean horizontal area 7/8" X 3/8" for engraving.  The other side is horizontal lines. The age is verified by script "Zippo" on the bottom plus the lll & lll on each side of the script. The lighter insert is the correct one for the 1968 year  also. The hinge is tight and snaps closed with the correct "sound".  This lighter would be a great present for someone who has a memory for 1968 and be perfect for engraving.