Both. Issue number is the most important (it\'s the real reference), but picture is very helpful when I have to verify if particular laptime is valid or not.
VW Golf GTI lap time at Sachsenring
|Vehicle||VW Golf GTI (Mk VI)|
|Power / weight||211 ps / 1318 kg|
|Average speed||122 kph (76 mph)|
|Submitted||18.11.2010 by autobildsportscars|
Reference: Auto Bild Sportscars Dec. 2010 http://www.pic-upload.de/view-7811433/IMG_0247.jpg.html