If you have a look on the database (link at top of this page) you might be able to find a serial number that is close to yours. That might help with dating the instrument. Otherwise have alook around the 'Catalogues & more' which might also help (again link at top of page).
I think if you click on 'Register' below the submit button you should be able to put in you details there. I used the same details as I do for the main site.
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