I have a older Halloran glass over glass, the newer calls can't compare. Look at the stamp on the back. Sold(https://uploads.tapatalk-cdn.com/20210216/1fe1531ed7805874ddb3adb7e1625fde.jpg)(https://uploads.tapatalk-cdn.com/20210216/2eb6b1f23f191cdf7d0ff7bff9e0ed48.jpg)
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I never got to run any of the older calls but i bet it sounds awesome!
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That glass pot from that time period is no joke!