New silver stacker here! Found a bunch of useful info on this site so I figured I would return the favor by depositing a bit of silver porn
Welcome These look like 10 oz bars? I notice your Sunshine Minting 10 oz bar has a hologram on the back similar to their 1 oz bar. Do you have a decoder lens?
Yes they are 10 oz bars. I did not bother with the decoder lens as my research led me to believe you could see the "valid" in the right light. I have found that to be true. Tilt the bars a certain amount from the light source and valid does shows up.
My understanding is sunshine mints older bars (V1) had a serial number but when they switched to the new mint si micro printing technology they figured the numbers were obsolete.
Count yourself lucky as us Brits would have paid over $1000 extra in tax to get silver porn like this.