Produksjonsår: 1961-1966

Manualer

• https://archive.org/details/husqvarna21aautomaticmanual

• service manual https://archive.org/details/husqvarna-class-21-service-manual-en 

Kilder

• 21A sine hemmeligheter https://youtu.be/5WcF2UcVMgc?feature=shared

• Introduksjon til 21A https://youtu.be/BYLrPxJjLts?feature=shared

• 4 timer med 21A https://youtu.be/HlIiFTVKpUU?feature=shared

• https://youtu.be/mRb9OiaEiuk?feature=shared

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