Not that I plan on hatching any but out of curiosity...

[AmyRey]

Any idea what the offspring of my buff orpington girls and my silver duckwing OEG rooster would look like?

 

[Chris09]

Amy:

If I am right you should get hens that are Fawn/Dun patterned silver incompleat columbian and the roosters should be Fawn/Dun patterned yellow/golden columbian.

Chris

 

[Krys109uk]

I've crossed something similar, buff orpington X silver grey dorking (which is silver duckwing) but the other way around giving sex linked crosses.
Your cross would look much like the males of my cross. So far they are mostly white (silver). Grey in the bottom of the hackles, grey flights, grey tail. They look like an untidy grey/silver columbian. I don't know why grey rather than black, but that's how they look. I expect when they mature the hackles will be brassy.

 

[AmyRey]

Interesting.

Any pictures?

 

[Krys109uk]

I haven't got any at the mo. Maybe tomorrow. BTW they are only about 5 weeks at present.