Royal Copenhagen Unique Art Nouveau blue crystal glaze lidded vase with silver mounting

Royal Copenhagen unique Art Nouveau blue lidded vase with an amazing crystal glaze and silver mounting by silversmith Anton Michelsen. Signed by artist Valdemar Engelhardt. Production number 383. Factory first, Height 17.0 cm. There is a small hairline crack at bottom, which probably happened when the silver was put on, see pictures please. Otherwise perfect condition with no chips, cracks or repairs.