Pardon the stupid question, but is that a left handed saw? Every circular saw I've ever owned had the blade on the right side.
It seems some companies just realized their saws were backwards for a right-handed person, so now there are more with the blade on the left.
Look at how many left-bladed saws appear on a search.
https://duckduckgo.com/?t=ffsb&q=portable+circular+saw&atb=v223-1&iax=images&ia=images
Bruce