(Sansevieria trifasciata 'Hahnii Marginated') very close cultivar but yours is properly called Sanserieria trifasciata Hahnii Jade Marginated. It has been around I think longer than I have been alive. It is found in 'The Sansevieria Trifasciata Varieties: A Presentation of All Cultivated Varieties', by B. Juan Chahinian (Author). It is a bird nest variety. Like I said, there are many in this group. I love the small multi leafed ones.
This one is Hahnii Marginated;
This one is plain hahnii;
This one is like yours, Hahnii Jade Marginated;
This is almost like Gold Hahnii called Golden Green;
Golden Hahnii;
Hahnii Siebert;
Hahnii Streaker;
Hahnii Silver Frost;
Hahnii Loops' Pride; (known for 'Stacking')
Hopes this helps. Stush