SE - Sweden
SE - Sweden

Sweden is divided into 21 Counties (Lšn in Swedish). The map shows the call areas in different colours and the Counties with their Names and 1 or 2-letter official codes. Of course you can use Wikipedia to detect the County.

EUCC-SE-AB County of Stockholm SM0 284 EURA-120
EUCC-SE-AC County of Vasterbotten SM2 284 EURA-113
EUCC-SE-BD County of Norrbotten SM2 284 EURA-113
EUCC-SE-C County of Uppsala SM5 284 EURA-116
EUCC-SE-D County of Sodermanland SM5 284 EURA-116
EUCC-SE-E County of Ostergotland SM5 284 EURA-116
EUCC-SE-F County of Jonkoping SM7 284 EURA-118
EUCC-SE-G County of Kronoberg SM7 284 EURA-118
EUCC-SE-H County of Kalmar SM7 284 EURA-118
EUCC-SE-I County of Gotland SM1 284 EURA-112
EUCC-SE-K County of Blekinge SM7 284 EURA-118
EUCC-SE-M County of Scania  SM7 284 EURA-119
EUCC-SE-N County of Halland SM6 284 EURA-117
EUCC-SE-O County of Vastra Gotaland SM6 284 EURA-117
EUCC-SE-S County of Varmland SM4 284 EURA-115
EUCC-SE-T County of Orebro SM4 284 EURA-115
EUCC-SE-U County of Vastmanland SM5 284 EURA-116
EUCC-SE-W County of Dalarna SM4 284 EURA-115
EUCC-SE-X County of Gavleborg SM3 284 EURA-114
EUCC-SE-Y County of Vasternorrland SM3 284 EURA-114
EUCC-SE-Z County of Jamtland SM3 284 EURA-114

This eQSL shows the QTH: Hernosand.

Put this info into the search engine of Wikipedia and you will find this:

The County is Vasternorrland and the code is SE-Y