Can you put a name to this?

[Anne Repnow]

25 years ago - not knowing any better  - I planted unspecified packaged snowdrop bulbs from the supermarket in garden nr. 1. Most of them died, of course. Some survived and multiplied to some extent and showed a spectrum of variation. A couple of years ago I selected a few bulbs of the best looking (to my unpracticed eye) and planted them in garden nr. 2. This plant developed beautifully. Can you put a name to it?

Both photographs were taken on Jan. 31, 2013 (Zone 7b)

[Anne Repnow]

These photos were taken of the same snowdrop on March 4, 2013

[Pauli]

Servus,

this is certainly a form of Galanthus elwesii

[Anne Repnow]

Thank you!

[Diane Whitehead]

It has a long-lasting flower.

[Anne Repnow]

Yes, I found that unusual - almost 5 weeks between the first and the second photograph.
And it blooms later than my other 'Elwesii's

[Alan_b]

It's a nice attractive elwesii but being bought from the supermarket it will not be a named cultivar.  The duration of snowdrop flowers depends a lot on the temperature; the longer it remains cold, the longer the flower last.  Infertile snowdrops may last longer; double snowdrops usually last a particularly long time.

[Anne Repnow]

Thank you, Allan!
And yes, our spring was long and cold and wet... 

[Maggi Young]

I see why you would have selected that one - it has the features I like in a snowdrop - big, bold mark and a full, voluptuous shape to the petals. If it makes a habit of being able to last for such a long time- it's almost worth having a poor spring!
 

[Anne Repnow]

True, different weather conditions mostly have their compensations - apart from hail! 
I'll watch out for that particular nameless drop and see how it behaves in the coming spring.