2005 AD., Luxembourg, Grand Duke Henri, Helsinki mint (Finland), 1 Euro, KM 81.

Luxembourg, Grand Duke Henri, engravers Yvette Gastauer-Claire (obverse), Luc Luycx (reverse), Rahapaja Oy mint (Helsinki, Finland), 2005 AD.,
1 Euro (23,25 mm / 7,45 g), bimetallic copper-nickel plated nickel center in nickel-brass ring (75 % Cu, 20 % Zn, 5 % Ni), 7,50 g. theor. mint weight, mintage 2.040.000 , axes medal alignment ↑↑ (0°) ,
Obv.: S (Helsinki mint mark) 2005 (four coins under a roof, logo of the Rahapaja Oy mint) / LËTZEBUERG / GC , legends behind portrait of Grand Duke Henri facing right, GC -monogram on ring below, encircled by twelve stars.
Rev.: 1 EURO / LL , map of Europe (1st map type, borders), to right 6 lines and twelve stars of Europe on the edge; engraver´s initials LL to r.
Edge: 3 segmented reeding sections (3 × 29 grooves) on an otherwise plain edge.
KM 81 ; Schön 72 .
from circulation in 2017

Year / Mint Mark / Mintage / other details
2002 21,318,525 bow mark
2002 1,500 bow mark; Proof
2002 72,002 bow mark; In Sets only
2003 1,500 sailboat mark; Proof
2003 106,500 sailboat mark; In Sets only
2003 1,600,000 sailboat mark
2004 1,500 sailboat mark; Proof
2004 68,555 sailboat mark; In Sets only
2004 9,001,000 sailboat mark
2005 S 2.040.000
2005 S 1,500 Proof
2005 S 47,000 In Sets only
2006 S 1,030,000
2006 S 2,000 Proof
2006 S 32,500 In Sets only

Luxembourgian euro coins dated 2005–2006 were produced at Rahapaja Oy, in Helsinki-Vantaa, Finland. Since the mint director does not affix a mint master mark to coins in production at this location, these coins do not bear a mint master mark.

More on https://en.wikipedia.org/wiki/Identifying_marks_on_euro_coins#Luxembourg