That's the one piece Bullmoose stem-handlebar!

Loved eighties mountain bikes. Everything up to suspension shocks in the turn of the decade, the 80's was the golden age of mountain bikes.

The guys that wrote The Dancing Chain point out some obvious linkages between classic Marin geometry, the Schwinn stingrays, and the French Standard bike design of 1946. They point out the early mountain bikes were closer to the French Standard classic touring bike geometry and suitability for rough road touring than the 'alpine geared' ten speeds of the 1970s.