6SN7 tubes "made in USA" branded Sentinel. ????

Since this is a preamp tube, I posted here. My question is who might have made these tubes? RCA?, GE?, ???

audiojudge06-11-2002 3:28am

ed_sawyer Details Discussions Posts This discussion Message User 588 posts 06-11-2002 at 04:03am Copy Comment URL Report Comment Edit Delete Post a pic and I can tell you. (was this one you got from me?) Thanks, -Ed
sugarbrie Details Discussions Posts This discussion Message User 3,854 posts 06-11-2002 at 04:26am Copy Comment URL Report Comment Edit Delete Sentinel was a brand of tube radio. They may have had special branded tubes made by someone else. Or maybe they made their own ??
rar1 Details Discussions Posts This discussion Message User 1,769 posts 06-11-2002 at 05:30pm Copy Comment URL Report Comment Edit Delete These were all popular styles back then. These look like radios made by PHILCO and CROSLEY. Sentinel had their own tube line, as I remember. Black & Red or Dark Brown & Red box. I have to check my Dad's store, he still has these radios around.