yes, as i recall, i could not tell difference between original and yamiya. good to have spare latch, in case one breaks, the antimon (what we call pot metal) is brittle and if treated roughly or exposed to elements, can break.
there is a guy on ebay who manfactures gorgeous stainless steel latch kits. alas, his lathces are not single action. while superior in material to original, they do not look exactly like original. i bought one to see what they are like and with the idea the latch could possibly be modified to single action. none the less, a gorgeous assembly.