IMG_20200807_slabs.jpg | Gwulo: Old Hong Kong

IMG_20200807_slabs.jpg

IMG_20200807_slabs.jpg
Authors: 

The one on the left seems to have nothing inscribed on it, while the one on the right is not that legible. Is the last figure a 7 or 0?

on the right

Date picture taken (may be approximate): 
Friday, August 7, 2020