Märklin tender locomotive 1021

Märklin tender locomotive 1021
around 1900, boiler with embossed logo and inscription .I., on the bottom plaque Made in Germany, cast iron and sheet metal hand painted in black with red, green and gold accents, both domes nickel plated, track 1, axle sequence B, clockwork drive and brake intact, only moving forward, with original two-axle tender, imitated headlamp and bell missing, plus key, played original condition with beautiful age patina and partial paint flaking, L including tender 30 cm.