Like all the Grand Dukes , Sergei was immensely wealthy .
Like his brothers George and Alexander , Sergei Mikhailovich was also fond of numismatics and gathered a large collection of coins .
Like all the Grand Dukes , Sergei Mikhailovich was immensely wealthy .
Like his brothers George and Alexander , Sergei Mikhailovich was also fond of numismatics and gathered a large collection of coins .