The TV looks like a Zenith, from the vertical channel display window and the words "Zenith Space Command" (barely visible in the photo). It almost has to be Zenith, IMO, since I'm sure the original Zenith Radio Corporation had ironclad patents on the designs of its TVs until they sold out to foreign interests in the late '80s-early '90s.
For MRX37 in the Detroit area: You should be getting several more DTV subchannels besides ThisTV, as the Detroit market is quite large. I live 30+ miles east of Cleveland and get MeTV (subchannel of CBS channel 19), Antenna TV (subchannel of FOX channel 8), COZI TV (subchannel of ABC channel 5), as well as THIStv as a subchannel of MyTV channel 43 and Movies! as a subchannel of CW network affiliate channel 55. I am almost sure your area's network stations must carry these subchannels and probably others, since the Detroit market is much larger than Cleveland (the latter includes two other smaller cities besides, each with their own TV stations). I'll take a look at the TV Guide listings for the Detroit area after I write this; I'll be surprised if I find only one station with a DTV subchannel since, again, this doesn't seem right in such a large TV market.
BTW, I got a heck of a laugh out of your post in which you said, "I only get this, and this, and this...", showing pictures of three TVs, each tuned to the Detroit area's THIS TV affiliate.
