Yeah, Doug. 1.5k is a better ballpark reference for the lower end of the DCR range.
For reference, I pulled a few off the shelf that were in easy reach in the closet. All mic or line to grid:
Newcomb TR-100: _________________________________________3.199k ohms
UTC P-16 (O-1):____________________________________________ 1.989k ohms
Thordarson T-50644 (K-7120744) from GE 4BA-1F: _____6.471k ohms
Triad 2426 (custom unit from the 50s or 60s): ____________5.932k ohms
Chicago BI-1: _______________________________________________1.343k ohms
RCA XT-2746 from BA-2A: ________________________________4.631k ohms
RCA XT-2874A from BA-3C:______________________________ 2.936k ohms