If they were original fitment to the wheels there is a sticker fitted to the wheel, But if they were fitted after, No sticker, But again if the bands were removed, but the sticker was Not, you don't know.
I eventually managed to buy the mobile band removal kit, £60, 7 years ago. Even the Kwik Fit mobile guy didn't have the kit, so * wasn't charged extra, as I removed and refitted the bands, No balancing problems.
The kit is like hens teeth to find and buy.