I have a gap in the Spiegel catalog info - missing 1935 to 1937 Spring & Summer - some where in that range they started having the guns drilled & tapped for scopes, so it's possible they may have offered barrel bands that way.
I was collecting this information to research the 22 pumps they offered - 1934 has the 'Stevens Peerless' theses were not drilled & tapped for scope block, 1937 Fall & Winter has the 'Stevens Model 29' - these were drilled & tapped for scope blocks, between these two models (based on serial numbers) I have the 'Springfield Repeater' (model 29 action) drilled & tapped and the 'Stevens Model 75-A' (29-A action) drilled & tapped, without catalogs I can't say for sure these were Spiegel guns but they share certain features not found on other models including being drilled & tapped the same and would fall in the 1935 to 1937 range based on model & serial numbers.
Last edited by GeneB; 12/13/17. Reason: correction
