Looks like a metal fin has been attached , prob by the manufacturer , which would cause me to ponder the age on this one .... the style/design of the wooden stops for the panes are as those still produced & used today (& for decades prior) .
I'd assume that the wood is 'paint grade' & wouldn't look as cool as one might hope ... but a pic of the I/S side might just serve me some crow for that opinion .
A bummer that the sill has been broken off , but could be replaced &/or trimmed off (as for a 'display-only') !
Around here , one of this size & state , they'll charge 50-75 USD .
I like the look of the glass , as a semi-obsure pattern .