Driven disk DT-75 soft (DV A-41) А 52.21.000-70, Kharkiv region.

Drive DT-75 soft (DV A-41)   
A 52.21.000-70 The structural feature of these disks is an increase in the bearing surface.
contact of the springs with the limiting disc. The specific pressure of the support turns of the springs has been reduced
on the disc details.
(//tractor-service.com)
                                                    Operation of these disks provides:

    ― 2-fold increase in motor resource of the disk without taking into account the change of friction linings;
    ― protection of the surfaces of the flywheel and pressure disc from being damaged in the event of a spring failure, which  
differs from the design with open springs