Poland RD 1923 Poland 1 Grosz - is this brass or bronze

[khokhloma]

Please help me to determine if this is brass or bronze (please note the coin id RD not common RB).

 

<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/rRx6iX5pe44lC-4-7pwvbg?feat=embedwebsite"><img src="http://lh4.ggpht.com/_8N6Jdb9PPRc/Sot6yRXnF5I/AAAAAAAAGas/0YHM0P4Duj8/s800/Poland%201923%20Gr%201.jpg" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/khokhloma/Coins?feat=embedwebsite">Coins</a></td></tr></table>

 

Ebay link -

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...#ht_2171wt_1165

 

Thank you all!

[khokhloma]

Please help me to determine if this is brass or bronze (please note the coin id RD not common RB).

 

High resolution images:

 

http://picasaweb.google.com/lh/photo/rRx6i...feat=directlink

http://picasaweb.google.com/lh/photo/JyUyt...feat=directlink

 

Ebay link -

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...#ht_2171wt_1165

 

here is a picture I found for the off metal brass grosz:

 

http://www.second-republic.com/OneGrosz1923Brass.html

 

Thank you all!

[Andrey5]

Brass is yellowish in color, like on the last image. The coin on eBay is bronze.