The ETA 2879 movement is a high-quality mechanical (automatic) movement produced by the Swiss brand Swatch. This particular model, ETA 2789-1, is made of stainless steel and is compatible with the ETA 2842 model. Although it is incomplete and may not currently be in working order, it has a good balance and is a valuable component for watch enthusiasts looking to repair or restore a timepiece. Its Swiss craftsmanship and reliable performance make it a sought-after piece for collectors and watchmakers alike.