What does um or nr next to a date mean? ~ Porcelain figurines ~ Metzler & Ortloff Um 1920 - 1930

[rockrancher]

I've notice several listing have the letters um or nr next to the date.  

examples:

Metzler & Ortloff Um 1920 - 1930

um: 1920

nr: 1815

Thanks 

[c.s.marshall · Accepted solution]

"Um" => "around", as in "circa"

"Nr." (short for "Nummer") => "no./number"