Here we have a Vintage, Retro, Shimano Altus LT Front Derailleur, 31.8mm Clamp, Bottom Pull. For double Chainset. The derailleur works as it should, all the adjustment bolts turn freely. As expected from a vintage item it does have some signs of age. The inside of the cage has a little bit of wear and there is some minor surface corrosion to the inside of the cage too. However it will do its job and would make a good addition to a vintage bike build.