Jm flow rig

Bit of a beater, male joint rig. Has water marks and some oil stains I haven’t been able to remove. Does not come with a bowl. 9.5 inches tall. Logo is flame polished into the glass. No idea of the age or really what the percs are called. Definitely has flaws, but no chips or major scratches. Video at the end shows condition the best. Maker is aka Flow Sci Glass, Mr. flow a glass, and maybe a few other names.