Topic: Orrefors cased clear glass vase

[Suzeb50]

Afternoon all!

I recently purchased a couple of crystal vases - one made by Waterford, Ireland and the other made by Orrefors.
I was quickly able to identify the pattern and age of the Waterford vase but, after about 3 hours of searching the Internet today, have been unable to identify the Swedish vase.

It is cased and incredibly heavy weighing a whopping 2917g !
The square top has slightly rounded corners and measures 11,7 cm wide
The vase itself stands 20,2 cm tall

Although at first a tad difficult to decipher, I believe the etching on the base says Orrefors 4421-03

The whole vase is reminiscent of something designed by Stromberg as the vase is very thick walled.

I can normally find something similar on the Internet but this has me stumped completely.
I did find a sort of similar vase etched 4421-02 but sadly it wasn't exactly the same as my one.

Can anyone please tell me who designed the vase and the approximate production date(s)?

Thanks for your time to read this question (*_*)