Need help Identifying these 2 Brass trigger guards
I hope someone out there can shed some light on these 2 trigger guards. The one with the backstrap and mainspring is a full-sized revolver. The hammer will have a roller on it, as the mainspring has the groove for roller to ride in. It has a serial number of 42566. The other trigger guard is a smaller revolver as shown next to the ruler. It has a serial number of V819.
Thank you in advance!