Help with etching under hallmark Reed & Barton plate

[sumana]

I cant find anything about this writing etched undreneath the hallmark on this plate. the closest thing i could find would lead me to assume that the b at the very bottom is a marking for the base material but even if thats what that is i cannot identify the rest.

this is a google image i found of the same plate:

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here is the etching:
REED&BARTON
249
HALLMARK
FON
ONK
B