US Propeller USP3 in a circle?

[Bear]

I have a US Propeller inc. prop, 22008, serial # UU166 and there is also stamped on it USP3 which is in a circle. Does anyone know what that means? Thank you.

[Dave]

No, but I recognize that design number as a commonly found drone propeller.

[Bear]

USP3 in a circle?

Thanks for the information. That is helpful. I still can't find what the USP3 in a circle means. I am trying my best but having trouble doing so on the net. Thanks again.

[MWP_Lamar]

Perhaps a quality control inspector stamp?

[Bear]

USP3 in a circle?

Good idea! Thanks, I am still looking. Have a great day.