I Have Just Rescued A Miyata 10 Speed From The Dump And I Am Trying To Get Info On Modle. The Serial # Is C123809. It Is Primered Now But Original Color Was A Light Or Teal Blue. I Have Disasembeledit To Rebuild. And Need To Knw The Modle Thanks For Any Help.

Try the Retro forum at www.roadbikereview.com (sorry to plug the competition, but that group has been helpful). You might be able to steel wool or scrape off the primer to reveal the original paint, so you could read the lettering. If not, you could post the type and model of components, so we can at least get an idea of when it was built and how expensive it was originally.
I don't remember when six speed freewheels replaced fives, but I think it must have been in the mid to late '80s. Other clues would be the location of the shifters (on the downtube generally means a better bike than long levers on the stem), whether it has "safety levers" so you can operate the brakes from the top of the handlebars (cheaper bikes often had them, more expensive ones didn't), whether the dropouts (the places on the frame where the axles mount) are forged or just look like pieces of stamped, flat metal welded onto the fork and the rear triangle (forged is better) and whether the wheels are steel (cheap) or aluminum (more expensive, though I think by 1985 or so most bikes used aluminum.

thanks for the info. the bike was probably a cheaper version, the shifters are on the stem, and it does have the center pull brake levers (thats what i call them). it has some really godd top end parts on it. it almost looks like a schwinn. i have a few of those and some of the parts are the same.

Try the Classic and Vintage section and post photos.