I recently picked up the following strip card that the seller deemed 1924 W-UNC. However, after viewing the following thread
Link, are 1924 (or 1926) W-UNC exactly the same was 1926 W511? For example, if you submitted the card to SGC or PSA, could you basically pick W-UNC or W511 on the submission form and the TPG would slab it as the one you picked because there was no way to distinguish between the two? When I looked at the 2010 Standard Catalog, both W-UNC and W511 are still listed and it didn't say that the cards were the same.
Here is another thread on W511 that I read:
Link