P&M 598cc, Panther, Redwing, 60. 1931/5. 1933/62etc. Cylinder Liner NOS 1936/63. 598cc OHV. Model 100. 100s.87mm bore. new, old stock. L: 18,3cm. AD: 90mm. ID: 87mm.Standard Bore. 3.4252" = 87mm. Bore out Cylinder to OD 90mm. Length 7.1/8. + or - ..0005" Made in EnglandPlease view ALL pictures