- or is this simply a half-sleeved Guernsey? Not a bad idea though - easier to do.
The nuns at school wore cotton 'sleeves', ie cuff-defenders & we all had to make one in sewing. It was a bit like a sampler or sailor's ditty bag insofar as it incorporated every technique known to man & we all had to produce one & get it past Sister Jean's bleary eagle eye before graduating onto Simplicity dress patterns - in my case an A-line pinafore with a conspicuous absence of clever stuff.
Both my infant sleeve & my roughy toughy ditty bag, constructed many years later in idle moments on HMB Endeavour, were joined by the same folded seam, which also features on jeans. An American fellow crew-member worked in the steel industry & when he saw what I was doing with my morsel of sailcloth & my sailor's palm, he said 'That's a Pittsburgh seam.'