Hello
In the middle is the master's mark
榮記, transliterated Rongji in Pinyin and Winggei in Cantonese. There are other styles of transliteration, such as Wing Kee.
As you mention, the retailer's mark at top is hard to make out. You might want to compare the actual object to a similarly rubbed mark seen before, that of the Nanking Shop in Shanghai. See this topic:
http://www.925-1000.com/forum/viewtopic ... 13&t=28763
Hopefully another contributor will have more information.
Regards,
David R