No, the earlier “G”s never carried a “snail” either in silver OR green. The green livery of G611 at Downpatrick is fictitious in three ways -
1. Only the G601s ever ran in green, never the 611s.
2. Even if they had, G611 has black side frames (should be green)
3. The snail and small number on the cabside is entirely wrong; should be large number and no logo.
When first in traffic the G611 series were black’n’tan. The tan band disappeared on SOME of them (not all) a few years later.
When the last three were in use in the mid / late 70s, 611 & 616 had no tan band, but 613 did.