Does the sequential build number on a 69 Barth travel trailer refer the number produced that year or the total number produced, and is it specific the the length of each model?
Gerrit

The Barth build # is broken down to YYMM #### LLFP.
Y-year 1963-1968 used letter A-63 B-64 C-65 D-66 E-67 F-68
M-Month
#- sequential build # Starting from 1rst Barth's
L-length
FP-Floor plan

D11-412-24
Nov.1966- 412th built-24'

68451622
April 1968-516th built-22'

8607-3344-31FP3
July,1986 3344th built-31', floor plan #3 (twin center bed)

Regency build #"s start back at 001

1995 Barth RSV restart build #'s at 001 using prefix of M-motor Coach, S-specialty vehicle, Y-trolly

Check the fine work Nick compiled under the Data Tag Project.