Hi Tony
My perception is that the Seydel 1847 coverplates are not the same as the
Hohner 150th Anniversary Standard Edition's. The Anniversary seems to be a
re-emblamed Big River. If you have a Big River in your arsenal, compare it
with your 1847s and you'll notice the 1847's 'higher' and shorter-radius
'ramp', absence of side 'vents', different back design, and longer
dimensions to accomodate the wider hole spacing.
Does one company make covers for the other? I don't know.
The Big Rivers have been around for a number years and have very nice
coverplates, indeed. Perhaps Seydel chose to encorporate some of the the
BR's better qualities, while improving on the rest.
Cheers,
Staggerin' Jim
Listen to Roots Harmonica at http://www.live365.com/stations/staggerinjim