Working Hard Thomas w/o Blush

I recently found this photo of what appears to be the Working Hard Thomas from the Rainbow Bridge set, but there’s no blush on the cheeks. Does anyone know if this was an actual face variation or just a custom?

Also, the running board on this one is white while the Rainbow Bridge one is gray, but that could very easily be swapped.

the actual set does feature Thomas blushing.

source thomas wiki

https://thomasmotorized.fandom.com/wiki/...Bridge_Set

I know, but the one I’ve shown here doesn’t have the blush. I’m trying to find out where this one came from (if it is an official product)

It looks like the blush has just been rubbed off from play like most TOMY face prints that aren't the eyes or mouth.

It's just a custom but I can't get the satisfactory answer from any sources. I researched too much but different different persons or references gives different opinions. So it is difficult to recognize the exact reason behind it. But I am still working on it for knowing the exact reason.

You can see these for references: https://www.flickr.com/photos/183311600@N03/, 
https://www.igmguru.com/digital-marketin...-training/,
https://thomasmotorized.fandom.com/wiki/...Bridge_Set

Trainboy custom IMO, I like the white RB’s more than the Grey/Gray RB’s