the first pic is showing a german EMC Einheitsmine Typ C (general issue type C) anchor and cable weight 1,135 kg, the same as modelled by Cammett.
The second mine has a very interesting history:
It's a russian M 08 mine introduced in 1908 with a warhead of 110 kg Trotyl and a total weight of 592 kg. In 1939 the mine was modernized with a new anchor system and a water pressure switch to arm; the mine got the designation M 08/39. After Polands occupation in 1939 the Kriegsmarine captured a lot of them in polish depots on Hela peninsula and in Gdingen. The 2nd s-boat flotilla, stationed at Ostende 1940, used M 08/39 between 10. july and 7. august 1940. During which they layed out 130 mines in 11 sorties. Half of which were type M 08/39. The last sortie of 2.S-Fl. was the night of 11./12. october 1940 with
S-30, S-34, S-36, S-55 and S-56 went to contamine the sea east of Orfordness; they used 10 M 08(r)*, 4 EMD, 12 SprB Sprengboje (minefield protection expl. buoy) and 4 RB Reißboje (minefield protection drag-buoy).
* M08(r) was the new german designation for the M08/39; "r" means "russian", a common method to mark captured weapons. (e) english and (fr) french origin.
Your 3rd pic's showing a boat of 2.S-Fl. in Ostende harbour being loaded with a mix of M08(r) and SprB/RBs.
Hope, I could help a little.
edit: armed mines (e.g. M08(r)) were painted black, while mines for drill exercises were coloured red/white.
The rails for the M08(r) seem to be narrower in width compared to the rails used for german ones.