From Sonic Retro
Magazine Preview #25 - Sonic 2 Manual Prototype Emerald Hill Zone 2P Scan
Source: Sonic 2 US Manual
|Source: Sonic 2 Final||Source: Sonic 2 Beta|
Yet another picture of a prototype in the Sonic 2 US manual. The rings counters are linked together, and the extra score counters make an appearance, unlike in the final. Assuming this screenshot was taken from the same source as the others (e.g. M08) in the manual, this is a later prototype than our ROM.