help valuating

I have this ottoman coin that is a silver coin but covered with gold because was used as a pendant . I haven't find any info in the net so the best place for it i think is this forum.
it is 20 para ah 1255 year 4 and below i would post the photos . any help would be sincerly appreciated .

 

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I'll check my catalogs when I get home.

 

thanks

 

BTW, it's going to depreciate in value quite a bit because it was used for jewelry.

 

ok found it in my 19th century Krause world coin catalog
Egypt 1255/4 (1842) KM#227 , weight 0.6800 g. .833 silver , 16mm size
grade/value
VG-$13.50 F-$27.50 VF-$50.00 XF-$75.00 UNC-$150.00
not sure what your coins grade is ?
not sure how much value will be taken away because it was gold plated ?
the hole in it will also bring the value down.
some people do collect holed coins.
Krause values may differ than real market value prices.