I think P304871 is from 1985 and P320154 from 2000 maybe
The 210-5 was obviously modified (rear sight, magazine button, compensator) and refinished
The other one has some attributes of a 210-6 (trigger, screwed sport hammer group) and was also refinished. Plus the modified magazine button.
There was a small series of high polished 210-1 with 210-6 attributes (trigger, screwed sport hammer group, front strap serrations) made in 1984/85. It did have the Swiss cross by the rear sight. Here is mine
The 210-5 was obviously modified (rear sight, magazine button, compensator) and refinished
The other one has some attributes of a 210-6 (trigger, screwed sport hammer group) and was also refinished. Plus the modified magazine button.
There was a small series of high polished 210-1 with 210-6 attributes (trigger, screwed sport hammer group, front strap serrations) made in 1984/85. It did have the Swiss cross by the rear sight. Here is mine


