Akira Komiya made a very interesting post today on this Wehrmacht-awards Thread. He covered a number of topics ranging from army tsuba, to RS and Zoheito, issue of Type 95s to officers. Here's the part about the army tsuba gold plating:
"I checked the specifications of the Type 94 and Type 98 swords regarding the piercing of the Tsuba and found that there is no mention of piercing so it is possible that such was an optional feature. (The specifications only state that there should be four raised engraving cherry blossoms on all four corners of both the obverse and reverse of the Tsuba and does not specify that the Tsuba be pierced.)
As for your sword, in the history of the Type 94/ 98 officer's swords, 1941 would not be considered "early" as it would already have seen various austerity measures applied in connection with the rapid expansion of the armed forces and the commensurate increase in the demand for swords as well as the shift towards the wartime economy.
For example, the specifications for both the Type 94 and Type 98 swords specify that the Tsuba be made of gold plated brass but the use of gold plating would later be abolished in connection with a series of directives issued by the Ministry of Finance in 1937 and 1938."