Silver or gold phase Welsh Harlequin ducklings?

[Rdillenbeck]

Hello there! I have 4 ducklings that are hatched on April 20th. How can I tell if they are silver or gold phase? Thanks for you help!

 

[Rdillenbeck]

Duck #1 female

 

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Girl #2 pink leg band

 

[Rdillenbeck]

Supposed male with pure redbanded leg

 

[Rdillenbeck]

Girl #3 red and white band

View attachment 2115778
Duck #1 female

With black leg band

 

[Rdillenbeck]

All the little babies