The Graphite Edge TXE came out after the Graphite Edge.
The Graphite Edge TXE came out in 1984. Yours with the USA Flag on it is a is a later production from 1985. It was before the Graphite Pro/Comp Pro line.
The Graphite Edge 2 came out 1988.
Djokovic Racquets specs: weight-358g balance-32cm SW-370 Flex 60RA