The Oris and Fortis watches you have posted appear to have the typical poorly printed dials found on Mumbai-specials, (which can also be sourced via the UK these days). They will often have the FHF/ST 96 movements.
Those Elida watches could well be NOS, particularly the gold coloured one (those plated striated cases shows any scratches very readily). Watches such as this are often found in NOS (or at least extremely good) condition as they were too unusual/ugly to sell in their day They were cheapish watches in their time and any value they now have is from their novelty allied with the often good condition. They are not necessarily desirable for their intrinsic qualities. The gold example at least appears to state "17 Jewels" on the dial and so may well have a 17 jewel movement. The other one with just the "21" on the dial may well have a 1 jewel pin lever movement. Whether they are truly NOS or not it doesn't sound like they have any recent service history and so would require a service to be factored into the overall price. That can make an otherwise cheap novelty not quite so attractive.