I've been looking into the yard stickers + other designations that the has used on the R62A fleet over the years and I've generally been successful at finding out what certain stickers meant. However, there are two designations that have stumped me:
In this picture of 1954, I know that it was Livonia based, but that orange diamond in the sticker confuses me. It can't be the brake valve modification since that happened later on when the car was based out of Corona, and not all of the Livonia singles received that orange diamond.
In this photo from the early 90s, both 1889 and 1805 have a green dot. Multiple Pelham cars received the green dots inside their sticker (at least seven of them), but again, not all units received them.
If anyone has an idea on what the green dot and orange diamond mean, help would be appreciated.