There are such coins and looks like original.
Silver coin
Y# 43 ROUBLE
20.7300 g., 0.8680 Silver 0.5785 oz. ASW Ruler: Alexander III
Subject: Alexander III Coronation Obv: Head right Rev: Crown,
scepter on pillow within wreath Note: Without mint mark.
Date Mintage F VF XF Unc BU
1883 279,000 60.00 125 275 700 1,000
1883 Proof — Value: 2,500
7.5 coin
Y# 63 7 ROUBLES 50 KOPEKS
6.4516 g., 0.9000 Gold 0.1867 oz. AGW Ruler: Nicholas II
Obv: Head left Rev: Crowned double imperial eagle, ribbons on
crown Note: Without mint mark, moneyer's initials on edge.
Date Mintage F VF XF Unc BU
1897 АГ 16,829,000 250 400 550 1,000 —
Original or not... You should check by examination. Good luck.