QUOTE: Originally posted by locomotive3 There's lots of varouss manufacturer F7s out there, IM, MRC, Athearn, Stewart etc but to answer the IM? MR reviewed the IM July 2001. "The new Regal drive mechanism is outstanding, quiet drive & powerful. and could pull up to 77 cars. Good engine weight, 18 oz.The air horns are huge". As near as I can tell, no mars lights. They probably were not in use in the 50s