I cannot well find the engraved mark “AA” form the indicated image. Please tell me the correct spell of the engraved mark. Also, are the all engraved marks “AA” same? If it is different, please tell me them specifically.
From the image shown, I can't see the mark on AA clearly so please let me know the correct spelling for the marking. Also, please let me know if the markings for all AA are the same. If not, please let me know about this specifically.
