Chinese Cash Coins [solved]

I have 3 Chinese cash coins and tried to identify them. I think I got the types right but I am not very sure about the variation and would like another opinion. Thanks in advance!
I only used the decriptions that are on the Numista coin sheets and I had only a ruler for the diameter and thickness.

       1 Cash - Shunzhi Lin              1 Cash - Qianlong Boo-yuwan     1 Cash - Qianlong Boo-chiowan

       
       

                  4.14g                                                             3.80g                                                      4.28g
                  27.2mm                                                       25.2mm                                               24.5mm
                   0.9mm                                                         0.9mm                                                   1.2mm
                                                                           DH#22.257 (Type F1)?      DH#22.220 (Type F2; South branch)?

yes looks good, all are correctly.

for nr.2 varinat look here:
https://en.numista.com/forum/topic40815.html

Thanks for the link to the Hartill excerpts ... looks like the Board of Works coin is a DH#22.252 ... not a perfect match but the nearest match I could find.