Definitely check it out to see what cartridge is on it. By the mid-80s, Radio Shack was offering linear tracking tables with P-Mount cartridges, but they still offered several conventional turntables that were supplied with OEM versions of Shure cartridges. The LAB 440 that I have was still available in 1984 and came with the R47XT as the standard included cartridge. The R47XT is an OEM variant of the M95 series with an oversized plastic front shroud, which some people trim to permit using any M95 type stylus. I've left min intact and am using it with a NOS Shure Ne95ED stylus (these are still available new from LPTunes):
It predates your mid-80s time frame, but I also have a Realistic Elac Miracord 45 that came with a Shure R700E, which is yet another OEM M75 variant. It was considered a pretty high end cartridge back in the day and replacement stylus options are plentiful.
It's not a Realistic product, but another Shure OEM cartridge to watch for that flies under the radar is the 2215. It's an M93 variant that came in the EZ-Clip mount with no plastic shroud. So, in addition to the M93 type, it will also accept the M91 (same size plastic grip) and M75 (low profile plastic grip) types of replacement stylii. This was an OEM model that came with the Panasonic-made MCS turntables that were sold by J.C. Penney.
Once you've had a chance to check yours out, let us know what cartridge you have. Unless yours was an entry level model, even as late as the mid-80s, most Realistic LAB turntables came with OEM Shure cartridges that were very high quality and still very desirable (and affordable).