Machine wash cold, inside-out, gentle cycle with mild detergent and similar colors. Use non-chlorine bleach, only when necessary. No fabric softeners.
Tumble dry low, or hang-dry for longest life.
Cool iron inside-out if necessary. Do not iron decoration.
Do not dry clean.
When you have finished with your Sparkwood and 21, please pass it on to somebody so that they can benefit from it as well. A charity shop, maybe.