My question relates to validity of a man wearing more than one piece of silver jewelry. Please could you assist?

Praise be to Allah, the Lord of the World; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

There is no harm for a woman to beautify herself with silver ornaments such as rings, necklaces and eardrops, since the Prophet (Sallallahu Alaihi wa Sallam) said: "Make use of silver and make of it whatever ornaments you like" . [ Ahmad , Abu Dawood and its chain of authorities is correct].
Some scholars deduced from the above Hadith that it is permissible for men to use silver. They added that impermissibility as using silver by men is not proved in the Sunnah.
Thus, we state that both women and men can make use of silver. But, women can use it as a beautification ornaments while men can use it as rings, and we have no  evidence that prevents men from using more than one ring.
Moreover, the above-mentioned Hadith supports our point of view.
Allah knows best.