Early 1900 Commercial

[gunnertwo]

Last week a co-workers father brought me a Luger he's had for 40 years. He knew I had interest and some knowledge so he decided to "bring & brag". The pistol is a 1900 Commercial in caliber 7.65, serial # 4585. The BUG proofs are present and it has the early safety lever. The gun is matching, has seen some use and the grips appear to have been revarnished. There is a heart shaped mark on the left side of the serial number that I've never seen before. Any opinions from the list? Attached are several images. Thanks.

G2