The one piece Bushnell base usually had the word HAWKEYE stamped on the top of the base. I have owned both "named" and un-named bases. They work with both a 1.3X and/or a 2.5 Phantom scope. Also as noted, there is also a set of two piece bases which use a molybdenum metal screws to attach in the two factory tapped mount holes, rear top of the hawkeyes' barrel. Of importance is the manner in which the three screws clamp the scope on the one piece base, as there originally is/was a stop block which was installed on one of the scope's attaching screws and aligned with the larger headed (of the two) screw which mounted the one piece base to the barrel. Buying the base is one thing. Finding the base noted with the correct two distinctly different size (height) screw heads is very important. BTW, the one piece base sold by Tasco, did not work with my attempts to use it with a Bushnell Phantom scope...........These Tasco bases were offered in bulk, boxed, on Ebay, in recent years.
