Both were recently added to my collection. The sellers did not properly identify these items. A quick check of the images and comparison to 2M-136 and 2M-137 listing confirmed a match.

It’s great that the seller’s  images included the original packaging.

Below is 2M-136.  Note the last line indicates “99 Co.”  M&R also states it was  issued by 99 Co. The reverse of the packaging (not shown)  indicated “JEWELERS BRONZE JAPAN”. These words also used in M&R.

 

 

Below is 2M-137  Note the last line also indicates “99 Co.”   The reverse of the packaging (not shown)  indicated “SILVER 1.000 FINE JAPAN”. These words also used in M&R.

 

Both were issued in 1973 with a mintage of 999 each.