Hi I have researched a fair bit and I have a monarch portable sewing machine,made or put together in meadowbank nsw serial no.19400 is there anything you can tell me about it like how old and just a rough valuation,the machine itself is in great cond and goes well but there are a few sections where the black and white cotton covering on the cords has frayed so we have tape around those bits but would like to get new cords put on if possible.