Hello Mike:
Welcome. Yes yours is a 1957 model.
Here's the history:
https://www.markiiforum.com/showthre...-2013-For-Sale
Here's everything you ever wanted to know about data plate info:
https://www.markiiforum.com/showthre...CODES-VINS-etc
Please pay close attention to the first attachment at the bottom.
Pat Marshall may contact you shortly to update the ownership history.
Very best regards,
John