noun
vintage item; antique; period piece
Refers to an item from a past era, often with nostalgic or collectible value. Used for objects that are not necessarily ancient but are characteristic of their time.
祖母の家で昭和の当時物の扇風機を見つけた。
I found a vintage Showa-era electric fan at my grandmother's house.
この店は当時物のレコードを専門に扱っている。
This shop specializes in vintage records.
ヴィンテージ is a loanword often used for fashion, cars, or wine, and carries a stylish nuance. 当時物 is a native Japanese term that can apply to any period item without the stylish connotation.
Compound of 当時 (とうじ, 'at that time') + 物 (もの, 'thing'). The exact historical derivation is uncertain, but the word straightforwardly means 'thing from that time'.