It is......a pair of Babache Harlequins!
Pictured above are 2 two-color Mister Babache Harlequins.
Diabolo's diameter is 5 inches (125 mm).
Diabolo's height is 6 inches (155 mm).
Diabolo's weight 335 grams.
This diabolo has a little bit more weight than most large (5 inch) diabolos. The added weight keeps the diabolo spinning longer, but of course you work a bit harder to gain speed.
Mister Babache diabolos were prabably the world-wide favorite especially in the 80's and 90's. The Harlequin is still very popular.
Mister Babache Diabolos from Switzerland
Harlequins Diabolos from Oddballs (UK)