Simplicity vintage sewing patterns are the most helpful in my opinion only because each envelope was stamped with a date! I mostly view Simplicity patterns to get a better date range for a vintage dress or blouse.
Descriptions: 1.} Rockabilly Vintage Blouse Pattern circa 1957 2.} 1940s Skirt Pattern 3.} Vintage Teen Dress Sewing Pattern circa 1949 4.} Low Back Blouse circa 1954 5.} 1950s Sundress Bolero Playsuit 6.} 1953 V Neck Summer Dress Sewing Pattern 7.} Vintage Blouse Patter circa 1947 8.} Cocktail Dress Vintage Pattern circa 1956 9.} 1954 Vintage Skirt & Petticoat 10.} 1940s Pinup Front Knotted Midriff Top With Shorts & Skirt
Image credits: All patterns are from Flickr from the Vintage Patterns group