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Victor, Buds Customer Service will need to answer this for you at 1-859-368-0371 9am-9pm EST Mon-Fri. or use the Blue Chat now button at the bottom right corner 9am to 9pm Mon - Sat and 9am to 7pm Sunday.
They are luck of the draw one may be marked and the next one may not as they come from multiple sources MY CPO "certified Pre-owned " is marked NPD and 4 numbers
Victor - the only way to know for sure is to call Buds and ask - Suggest you contact Bud's directly at 1-859-368-0371 (9am-9pm EST Mon-Fri) or use the "chat now" button located at the bottom right hand portion of your screen, (9am-9pm EST 7 days a week) and ask. Buds, however, is usually pretty good about stating in the descriptions if they are marked with police markings, such as this Glock: https://www.budsgunshop.com/catalog/product_info.php/products_id/415004755/used+glock+27+40sw+gen4+no+box+ns+2+mags+ksp