more grip pictures

Is there any easy way to distinguish Original Black Plastic

grips from reproduction or import grips?Do the original

grips have manufacturers'or proof marks'present?I recently

examined a 41 BYF in the W Block,this weapon had the Black

Plastic Grips.The Grips fit the weapon very well.The backs

of the grips were smooth.There was a threaded well on each

grip.I understand this 'Well'was used to remove the grip

from the mold.There were no markings of any type on the

grips.

Any help will be greatly appriciated.


Tom