Mantle clock

mantle clock was given as a gift a few years back i would like to no if it has any value for insurance purpose it has been boxed up for all the time i have had it and would like to use it, i no you do not do value where could i get this done , the size of the clock is H 17 1/2 W 9 D 5 inches in size,greenish in colour, and vey loud tick, its has no 3137 KB/J, H A C ,Made in Wurttemberg. on the back door of the clock, i do no my friend had it for a lot of years before giving it to me she does not no where she got it