True Vintage 50's 60’s Handmade Hand Knit Cowichan Cardigan Sweater Jacket L?

Vintage 1950's- 1960's era knit cardigan featuring a beautiful horse on the back, shawl collar, full zipper, and 2 symbols on either side of the front : horse shoe and number 54. (54 may reference the year it was made, or something other; I attached screenshot of what it means in numerology). Handmade Zipper is hand stitched on Unknown size, please refer to measurements Condition This sweater is in good vintage condition with minimal signs of wear and couple small stains ⚠️ they may come out, i did not try. Contents Wool? Human model photo is AI generated, so fit may not look right. Shown on a Medium (8) dress form. Measurements of this garment laying flat and unstretched: Underarm to underarm: 23 Sleeve from under neck/collar: 29 sleeve from armpit: 17 Length (shoulder to hem): 27front, 29back