Joined: Jan 2009
Posts: 44,306
Likes: 6,564
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
That tire is from the late 70's or early 80's. It was made by Mitsuboshi (and that's the correct spelling), not National/Panasonic/Panaracer. It was an excellent tire. I love Japanese bike tires.
And yes, that horrible method of putting in a misfitted tube works most of the time. It's amazing how many rules you can break with inner tubes.