Do all mark4 scopes have a mk4 logo on the bottom? How do you distinguish between a vx111 m3(which I've never actually seen, only heard of)and a mk4 LR/T m3 if buying used? I just bought a mk4 on the ee and am surprised to find no markings other than the leupold symbol on he parralex knob, and the made in USA underneath. Is this a mk4 or a vx3 or are they the same scope with two names based on date of manufacture? It looks like the mk4lr/t m3 on the leupold web site. thanks for any info
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