Unless i'm missing something along the way. after much research, it seems to me that this page has the obverse of KM#43 and the reverse of KM#28
https://en.numista.com/catalogue/pieces9867.html
https://colnect.com/en/coins/coin/726-3_Mark_Drei_-_A_D_E_F_G_J-Reichsmark_Coinage-Germany_Weimar_Republic
https://colnect.com/en/coins/coin/725-3_Mark_3rd_Anniv_Weimar_Constit_-_A_D_E_F_G_J-Reichsmark_Coinage-Germany_Weimar_Republic