I found more parts, needing help with identification

[spomalley86]

Found these in a barn that I am still picking through. I'm unable to identify. Thank you again for your help and expertise.
Sean

 

[gkeep]

Cogs from a tandem? Looks like a New Departure clutch part A3 model A or D?

 

[spomalley86]

I'm still digging some out

 

[Mercian]

Hi,

I think top left is an early (tens-teens) Morrow cog before they started putting the spoke slot in it. Below is a wrecked one on one of my bikes for comparison. And, of course, if it was for sale, you can see I have a good home for it. (Also a period Morrow brake arm, should you find one...)

Best Regards,

Adrian

 

[spomalley86]

I believe I have about 3 or 4 nos morrow brake arms