NOS Genuine OEM 'Limited' emblem for Buick Regal and Century cars. GM#20089912 PG (Parts Group) 12.812.  Brand new in the original packaging.  The item in the pic is the item you will receive. 

Per the research below, this emblem will fit:

1984 - 1987 Buick Regal 
1980 - 1996 Buick Century
1992 - 1996 Roadmaster

I am not an expert on this part.  Please confirm compatibility for your inteded application and ask any questions before buying. 

I bought a bunch of NOS Ford Lincoln Mercury Pontiac Cheverolet GM parts recently.  See my other items for more NOS parts.

Thank you for looking!

Year         Make Model Body & Trim Engine & Transmission
1996 Buick Century Custom, Limited, Special 2.2L L4 - Gas, 3.1L V6 - Gas
1996 Buick Roadmaster Limited Collector's Edition 5.7L V8 - Gas
1995 Buick Century Custom, Special 2.2L L4 - Gas, 3.1L V6 - Gas
1995 Buick Roadmaster Limited 5.7L V8 - Gas
1994 Buick Century Custom, Special 2.2L L4 - Gas, 3.1L V6 - Gas
1994 Buick Roadmaster Limited 5.7L V8 - Gas
1993 Buick Century Custom, Limited, Special 2.2L L4 - Gas, 3.3L V6 - Gas
1993 Buick Roadmaster Limited 5.7L V8 - Gas
1992 Buick Century Custom, Limited, Special 2.5L L4 - Gas, 3.3L V6 - Gas
1992 Buick Roadmaster Limited 5.7L V8 - Gas
1991 Buick Century Custom, Limited, Special 2.5L L4 - Gas, 3.3L V6 - Gas
1990 Buick Century Custom, Limited 2.5L L4 - Gas, 3.3L V6 - Gas
1989 Buick Century Custom, Limited 2.5L L4 - Gas, 2.8L V6 - Gas, 3.3L V6 - Gas
1988 Buick Century Custom, Limited 2.5L L4 - Gas, 2.8L V6 - Gas, 3.8L V6 - Gas
1987 Buick Century Custom, Limited 2.5L L4 - Gas, 2.8L V6 - Gas, 3.8L V6 - Gas
1987 Buick Regal Limited 3.8L V6 - Gas, 5.0L V8 - Gas
1986 Buick Century Custom, Limited, T-Type 2.5L L4 - Gas, 2.8L V6 - Gas, 3.8L V6 - Gas
1986 Buick Regal Limited 3.8L V6 - Gas, 5.0L V8 - Gas
1985 Buick Century Custom, Limited, T-Type 2.5L L4 - Gas, 3.0L V6 - Gas, 3.8L V6 - Gas, 4.3L V6 - Diesel
1985 Buick Regal Limited 3.8L V6 - Gas, 4.3L V6 - Diesel
1984 Buick Century Custom, Limited, T-Type 2.5L L4 - Gas, 3.0L V6 - Gas, 4.3L V6 - Diesel
1984 Buick Regal Limited 4.1L V6 - Gas, 4.3L V6 - Diesel