What is the difference between Cal# 40 – *1885; Cal# 41 – *1886; Cal# 42 – *1887

What is the difference between Cal# 40 – *1885; Cal# 41 – *1886; Cal# 42 – *1887; Cal# 43 – *1887

The year in the star.

and the difference between Cal# 42 and Cal# 43 ?

Hello, there was an error on the Cal#43, 1885*1887 coin, as the assayer's initials should have been MPM instead of MSM of the Cal#42 1885*1887 coin. 

Now this mistake has been fixed:

Cal#42: 1885 MSM *1887

Cal#43: 1885 MPM *1887

As a curious fact, the 1885*1886 and 1885*1887 coins were all minted during the reign of Alfonso XIII. 

Thank you for pointing out this error.

Oscar