Dating antique screws

Unfortunately, this process is not straightforward. Original clasps are often replaced with inappropriate substitutes made from different materials and from different time periods.

For example, if you come across a flapper bead necklace from the roaring twenties with a magnetic clasp, the clasp can’t possibly be original to the piece.The following two charts on clasps contain helpful information to help you with your detective work: Important Clasp Developments: Prior to 1800: s-hook, hook, pin & barrel, slide-out (tongue-in-groove) clasp, toggle Circa 1840: spring ring clasp Circa 1890: screw barrel clasp Circa 1940: box clasp Circa 1990: magnetic clasp* *(note: A patent for a magnetic clasp was applied for during the 1950s but it did not see mass-market production) Common Vintage Necklace Clasp Types by Era: Early 1900s through the 1920s: pin & barrel, screw barrel, spring ring, hook, slide-out 1930s through the 1940s: spring ring, hook, fish hook, box, screw barrel, fold-over latch, slide-out, multi-strand 1950s through the 1960s: hook, fold-over latch, fish hook, box, slide-out, multi-strand 1970 through the 1980s: spring ring, screw barrel, fold-over latch, hook, lobster, toggle, fish hook, box, slide-out, multi-strand 1990 and beyond: lobster, trigger, magnetic, toggle, fish hook, screw barrel, spring ring, slide-out, tube (modern pin & barrel), multi-strand Of course, even with the helpful charts above, you must follow a few words of caution: None of the information above will help you date a vintage necklace if someone has replaced the clasp. Clasps are susceptible to corrosion and breakage over time.This should not be surprising since clasps see more wear than the rest of a necklace due to continued opening and closure through the years.Don’t worry; you won’t have to attain this knowledge from scratch.There is a helpful chart that summarizes popular clasps for each era in the 20th century a bit later in this discussion.

Leave a Reply

  1. updating system cashes time aut dont not worrynothing fatal 01-Jul-2019 09:36

    The Casual Lounge is a rather small adult dating site…

  2. Freesexchats nosign ups 31-Mar-2019 15:13

    They are cheating just because they are bored with their habitual sex routine with the husbands. I am just looking for guys near my age who want to talk, go to movies, eat out-things like that.

  3. Free trial and free coins on sexweb cams 23-Aug-2019 00:04

    Reared in a poor family on the western frontier, Lincoln was self-educated, and became a country lawyer, a Whig Party leader, Illinois state legislator during the 1830s, and a one-term member of the United States House of Representatives during the 1840s.

  4. Libya adult chat 10-Mar-2019 17:11

    This is a real Arab sex camera site with Muslim girls.

  5. beyond use dating usp 795 15-Jul-2019 20:12

    Pay per minute, rentals, or download to own are some of the easy options for viewing.