What happened to the original brass plates?

I searched and saw your answer to this question, but it didn't answer it. Do you or any church historian know what happened to the brass plates after Mormon transferred them onto the gold plates?

Solid Brass Plate Recessed Pull - Lee Valley Tools

Vintage Italian Brass Plate for Industrial Chalcographic Engraving, 1940 for sale at Pamono

S.S TRADERS Small Pure Brass Plate for Puja / Diwali / Bhog Thali with Beautiful Flower Embossed Design (Golden) Set of 2pcs : : Home & Kitchen

12 Classic Push Plate

File:A large brass plate 03.jpg - Wikimedia Commons

Indian brass plate.

Classic Spring Latch for Doors with Locking Pin (Privacy) ~ 2-3/4 Bac – Hardwick & Sons

First Watch Security Polished Brass Mortise Trim Plates (2-Pack) 1142 - The Home Depot

Lot - ANTIQUE INDIAN NIELLO BRASS PLATE

Old Dutch Antique Brass Charger Plate, 13-Inch Diameter : Home & Kitchen

What Parts of the Old Testament Were on the Plates of Brass?

Brass plate inscription hi-res stock photography and images - Alamy