Original ISKRA carbon film 1W resistor 560k ohms
Type UPM100 15mm x 5mm dia (skinny early production)
As used in Marshall, Dumble and Hiwatt amps in the 60s/70s
These are new - old stock
Sold individually
NB I understand that ISKRA 1W resistors were initially made in a 15mm x 5mm package (skinny) which became a 15mm x 6mm package (chubby) in later years. If matching with existing 1W resistors make sure you have the right variant.