List of Finish Codes/Symbols
U.S.  BHMA Baldwin Description
9 611 n/a Bright Bronze
10 612 100 Satin Bronze
10B 613 102 Oil Rubbed Bronze (Antique Bronze, Oiled)
15 619 150 Satin Nickel Plated
15A 620 151 Antique Nickel
26 625 260 (Bright Chromium Plated) Polished Chrome
26D 626 264 Satin Chrome Plated (or Chromium)
28 628 280 Satin Aluminum
3 605 030 Bright Brass
32 629 320 Bright (polished) Stainless Steel
32D 630 324 Satin Stainless Steel
4 606 040 Satin Brass
5 609 050 Antique Brass 
USP 600   Prime coat paint (Usually grey, but varies)
DURO     Painted Dark Bronze/Brown - See DU Below
Lifetime 505 003 Polished Brass Lifetime - various manufacturers offer a limited lifetime warranty on these finishes. 

Other Codes:

BT Brass Tone (Painted to simulate brass, or dull brass)
AL Aluminum Painted Finish
AB Antique Brass
DU Duronotic Painted Finish (Simulated Storefront Bronze)
PB Polished Brass
S Stainless Steel