Lot of rhinestone earrings any ideas of year?

[wc_goods]

I found these earrings at an estate sale this weekend.  I've seen lots of earrings over the last few years, but this style of hook I have seen very little. The bottom right pair have a screw back which I have never come across.  Does anyone have any ideas on these earrings, what year they could be from?

[woodw_sandr]

The shepherds hook style earrings with the latch mechanism were popular in the 1950's-60's.

The screw back studs were also from that era and normally used over the push on backs for more expensive earrings, such as karat gold,  gemstone or cultured pearls.

[wc_goods]

Thanks, I figured they were possibly from that era, but I read that these were still used today. Its just odd that as much vintage jewelry I have seen, I have seen very little of these type of hooks for earrings. I also haven't really seen any earrings like these at sales or thrift stores. They just really seemed unusual to me. Thanks for your answer.