That's a really nice chubby billiard.There is almost nothing to go on with the first one because it has no stamping besides the GBD stamp. The stem is orific. I know very little about the timeline of GBDs and whether it should have a rondelle or not
Orific bits were discontinued mid 1920s
English silver hallmark date letters are the surest way of dating a GBD pipe accurately
French hallmarked GBDs do not have date letters