Black octagonal (ELSA) ring with white 5 alpha-numeric code, letter H and 4 other characters.
note 1 : used at Hiddensee Bird Ringing Centre until 2010
note 2 : Produced ring numbers: H1001 – H9999, HC001 – HC999, HE001 – HE999, HH001 – HH999, HK001 – HK999, HL001 – HL252
note 3 : Reserved ring numbers: until HL999, HM, HN, HP, HR, HS, HT, HU, HV, HW, HZ, Z0001 – Z9999
note 3 : Code DEH on ring indicates this is the Hildensee scheme in Germany.