I found this glass shard with an old logo/stamp/mark on it in a wide alley by my house, which was used as a dump zone for dirt from Washington DC. Here's the challenge: use the logo/stamp/mark and number to identify what the glass shard was, who made it, and roughly what year he was made (like, a decade).
Here's a close-up of the logo/mark:
Here's a close-up of the logo/mark:
