Example how to "valuations search" can be used. In case of search valuations for Russian Empire's Rubles in price range [$100 - $1000] it can be done in following way:
go to "Valuation search" page
type 'ruble' in valuation search input
filter price range [$100 - $1000]
filter "Russian Empire" - and valuations for Russian Empire's Rubles in price range [$100 - $1000] is displayed.