Russian musical instrument dealers often added tin or celluloid shields with their business names to the instruments’ headstocks. I’ve gathered some:

Julius Heinrich Zimmermann. Riga, St. Petersburg, Moscow

Julius Heinrich Zimmermann. Riga, St. Petersburg, Moscow, Leipzig

Julius Heinrich Zimmermann. Moscow, St. Petersburg, Riga

= Music = I.F. Mueller, Moscow

Musical Store T/H (trading house) Lemberg, Lekae and Co. Moscow, Kuznetsky Most 15

Trading House F.I. Detlaf and Co. Moscow

Muir and Merrilees Department Store, Moscow

Harmonicas, Mandolins, Guitars, Balalaikas, Strings. N.A. Kolchin, SPB (St. Petersburg) V.O (Vasilyevsky Island) Kadeskaya Liniya

An earlier Kolchin shield

M.K. Korotkin, Kharkov, Ekaterinoskavskaya No.7

Sewing machines and Musical Instruments store of F.S. Ovcharov, Jusovka, Ekaterinoslav

Musical Instruments and Gramophones Store of S.I Liberstein, Kiev, Proreznaya 22

The Greatest Musical Instruments Depot in the South of Russia of E.Z. Petrov, Novocherkassk

The Grimm Brothers Trading House, St. Petersburg

Musical Instruments Factory of J. Rozmyslov. St. Petersburg, Sadovaya 38

Musical Instruments of Alexei Rozmyslov, St. Petersburg, Sadovaya 47

V.Petroff and Son

Schuster & Co, Kiev

Iv. Gr. Chistyakov, Gramophones and Musical Instruments. St. Petersburg, Nevsky 112

Trading House G.S. Chistyakov and Son, Kronstadt

Trading House E.V. Gorbunov & Co. Formerly N. Marechen, Kharkov, Moskovskaya 18

Heinrich-Ignatius Jindrjisek in Kiev and Baku

The Widest Warehouse and the Factory of Musical Instruments of Nikolai Petrovich Koshelev, St. Petersburg, Razyezhaya 19

The warehouse and Factory of Musical Instruments of N. P. Koshelev, St. Petersburg, Razyezhaya 19

Music shop of the Grammophone Society. Astrakhan, Moskovskaya Street, House of  Bagiroff.

Krasilnikov Bros. in Kursk

I. A. Suzanadjan, Tiflis

Musical Intruments Depot of Kirillov Bros. Ekateringofskiy Prospect, 80, St. Petersburg

A. F. Gerhard, Kharkov

P.P. Magakov, Moscow, Cherkasskiy Pereulok, Golitsyn’s house

Musical Instruments and Sheet Music R.F. Golnik, Tsaritsin-on Volga, Moskovskaya Str. House No. 14

Music, Gramophones, Pathephones. Trading House of M. V. Kukuev, Moscow, Nikolskaya 3, Opposite to the Upper Trading Rows

J.J. Elcke. Libava, Vokzalnaya St. No. 8. Mitava, Katolicheskaya St. 26

Music Shop of The Lyrophon Society, Saratov, Alexandrovskaya St., The House of Karpov

Music Shop “Northern Lyre” of P.D. Shubin, Arkhangelsk

Trade and Manufacturing Partnership I. Vinokurov and N. Sinitsky, Sadovaya 29-35, St. Petersburg, 10 medals at the Exhibitions

Music Shop  of V.A. Guminsky, Nizhni Novgorod, B. Pokrovka

Heirs of L.G. Adler, Rostov on Don