I have just search my silver. The silver that I have 1799 - has a different shield. So my 1806 silver is proberly the first in this patern.
This spoon is (grÃ¸dske) is 37 cm and approx 1910.
It is made by Carl M. Cohr and the reason that I show is that my spoon is factory made. Please see detail.
So when I see your spoons I see a silversmith making them in the traditional way - compare that with my 1910. My spoon har the CMC mark - and the mark of a silversmith. But my "silversmith" has bought the spoon from a factory - adding his mark selling as his own production.
Yours are not made that way. I soppose that the shift - to factory was started after 1850 and in 1880/1890 the factories was dominating leaving the silversmith as more of a retailer.
My 37 cm spoon I bought January 3rd 2009 - and I have already regretted this buy. Empire pattern should be from that time - I will remember never to buy new again. Only from the original period.