The AZ 23/28 or AZ 23/28 Pr, as far as I know / could find in documents, was used in these projectiles:
8,8cm Sprgr. L/4,5 (Kz)
8,8cm Sprgr. L/4,5 Stg
8,8cm Sprgr. L/4,5 (Pr Zugz)
8,8cm Sprgr. L/4,5 (Üb.R.)
8,8cm Sprgr. L/4,5 (Üb.W.)
8,8cm Sprgr. Flak 41
8,8cm Sprgr. 43
10cm Gr. 19
10cm Gr. 19 (Üb.B.)
10,5cm Sprgr. L/4,4
10,5cm Sprgr. L/4,4 Stg
10,5cm Sprgr. L/4,4 (Pr Zugz)
10,5cm Sprgr. L/4,4 (ÜbW)
10,5cm Sprgr. L/4,4 (ÜbR)
12,8cm Sprgr. L/4,5
12,8cm Sprgr. L/4,5 (ÜbW)
12,8cm Sprgr. 5151 L/5,0
When regular AZ 23v was used in the 8,8 cm and 10,5 cm AA guns premature explosions occured just before or inside the barrel. So the spring between the needle and primer carriers was strengthened and the fuze was designated AZ 23/28.
Note: There was also kl AZ 23/28 used for the 8,35 cm AA gun of Czech origin.