I have had this for a long time and used it on several different projects. I usually try to research on here and CL before I part with something. I have only seen an older version which was rustier. I'm guessing this one is late 40's-early 50's. I'd like any info and ideas on value. Unseen in the photo is that there are 3 holes on each side brace to allow mounting on different size bikes. The whole sides that drop down which also hold the braces can be removed and are held with screws/nuts. I think I've seen some that were riveted and not removable. I suppose rivets could be drilled and screws added, but that does not appear to be the case here. Very little rust, which is only surface. All hardware and parts for the mounting at the front are there. Like I said, looking for value but also curious maybe of manufacturer, age, etc. Thanks for any help.