METEX DG scope 20 MHz, this is a product designed at about 1995 and product release was at 1997~1998.
I did came across of one this sold as new ( but this is discontinued product , unsold stock ) in one Greek electronics e-shop.
METEX DG scope 20 MHz, this was one product helping mostly in verification of problems when repairing color TV of 90s.
Such DSO today it is considered as good for museums.
Software option for it this is also a dead end, windows software was available in two floppy discs.
PC Connectivity was made by RS-232 cable and port communication was possible at very slow Bawd-rate.
Bellow it is attached METEX DG scope 20 MHz service manual.Here is a link from Russia (product pictures and PC software)
METEX DG scope 20 MHz Windows Software